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You searched for: Subject term gold Remove constraint Subject term: gold Subject term hydrogen production Remove constraint Subject term: hydrogen production
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1. 3D-Array of Au–TiO2 Yolk–Shell as Plasmonic Photocatalyst Boosting Multi-Scattering with Enhanced Hydrogen Evolution

Author:
Shi Xiaowei; Lou Zaizhu; Zhang Peng; Fujitsuka Mamoru; Majima Tetsuro
Source:
ACS Applied Materials & Interfaces 2016 v.8 no.46 pp. 31738-31745
ISSN:
1944-8252
Subject:
electron transfer; electrons; energy; gold; hydrogen; hydrogen production; irradiation; lighting; nanospheres; photocatalysis; photocatalysts; photoluminescence; silica; solar energy; solar radiation; titanium dioxide
Abstract:
... Nowadays, how to convert solar energy efficiently to other energies, such as chemical energy, is an important subject. In the present work, gold nanosphere (AuNS) monoencapsulated in TiO₂ hollow nanosphere (Au–TiO₂) and three-dimensional assembled array of Au–TiO₂ (3D-array) were fabricated to carefully explore the multiscattering effect on the photocatalytic activity of H₂ generation under simula ...
DOI:
10.1021/acsami.6b12940

2. A Au/Cu2O–TiO2 system for photo-catalytic hydrogen production. A pn-junction effect or a simple case of in situ reduction?

Author:
L. Sinatra; A.P. LaGrow; W. Peng; A.R. Kirmani; A. Amassian; H. Idriss; O.M. Bakr
Source:
Journal of catalysis 2015 v.322 pp. 109-117
ISSN:
0021-9517
Subject:
Raman spectroscopy; X-ray photoelectron spectroscopy; copper; cuprous oxide; electron transfer; ethylene glycol; gold; hydrogen; hydrogen production; nanocrystals; nanogold; nanoparticles; photocatalysis; titanium dioxide
Abstract:
... Photo-catalytic H2 production from water has been studied over Au–Cu2O nanoparticle deposited on TiO2 (anatase) in order to probe into both the plasmon resonance effect (Au nanoparticles) and the pn-junction at the Cu2O–TiO2 interface. The Au–Cu2O composite is in the form of ∼10nm Au nanoparticles grown on ∼475nm Cu2O octahedral nanocrystals with (111) facets by partial galvanic replacement. X-ray ...
DOI:
10.1016/j.jcat.2014.11.012

3. A New Class of Electrocatalysts for Hydrogen Production from Water Electrolysis: Metal Monolayers Supported on Low-Cost Transition Metal Carbides

Author:
Esposito Daniel V.; Hunt Sean T.; Kimmel Yannick C.; Chen Jingguang G.
Source:
Journal of the American Chemical Society 2012 v.134 no.6 pp. 3025-3033
ISSN:
1520-5126
Subject:
carbides; catalysts; cathodes; electrolysis; energy; gold; hydrogen; hydrogen production; molybdenum; palladium; platinum; tungsten
Abstract:
... This work explores the opportunity to substantially reduce the cost of hydrogen evolution reaction (HER) catalysts by supporting monolayer (ML) amounts of precious metals on transition metal carbide substrates. The metal component includes platinum (Pt), palladium (Pd), and gold (Au); the low-cost carbide substrate includes tungsten carbides (WC and W₂C) and molybdenum carbide (Mo₂C). As a platfor ...
DOI:
10.1021/ja208656v

4. A New Core/Shell NiAu/Au Nanoparticle Catalyst with Pt-like Activity for Hydrogen Evolution Reaction

Author:
Lv Haifeng; Xi Zheng; Chen Zhengzheng; Guo Shaojun; Yu Yongsheng; Zhu Wenlei; Li Qing; Zhang Xu; Pan Mu; Lu Gang; Mu Shichun; Sun Shouheng
Source:
Journal of the American Chemical Society 2015 v.137 no.18 pp. 5859-5862
ISSN:
1520-5126
Subject:
alloy nanoparticles; catalysts; catalytic activity; durability; electrodes; gold; hydrogen; hydrogen production; nanogold; nickel; oleic acid; sulfuric acid
Abstract:
... We report a general approach to NiAu alloy nanoparticles (NPs) by co-reduction of Ni(acac)₂ (acac = acetylacetonate) and HAuCl₄·3H₂O at 220 °C in the presence of oleylamine and oleic acid. Subject to potential cycling between 0.6 and 1.0 V (vs reversible hydrogen electrode) in 0.5 M H₂SO₄, the NiAu NPs are transformed into core/shell NiAu/Au NPs that show much enhanced catalysis for hydrogen evolu ...
DOI:
10.1021/jacs.5b01100

5. A Spectroscopic Study on the Nitrogen Electrochemical Reduction Reaction on Gold and Platinum Surfaces

Author:
Yao Yao; Shangqian Zhu; Haijiang Wang; Hui Li; Minhua Shao
Source:
Journal of the American Chemical Society 2018 v.140 no.4 pp. 1496-1501
ISSN:
1520-5126
Subject:
ammonia; catalysts; electrochemistry; electrodes; gold; hydrogen; hydrogen production; infrared spectroscopy; nitrogen; platinum; reaction mechanisms; spectral analysis
Abstract:
... The electrochemical reduction of nitrogen to ammonia on Au-based catalysts showed a reasonably high Coulombic efficiency. The pathway of this promising reaction, however, is not clear partially due to the lack of information on reaction intermediates. Herein, surface-enhanced infrared absorption spectroscopy (SEIRAS) was employed to study the reaction mechanisms of nitrogen reduction on an Au thin ...
DOI:
10.1021/jacs.7b12101

6. A facile strategy to fabricate plasmonic Au/TiO2 nano-grass films with overlapping visible light-harvesting structures for H2 production from water

Author:
Enzhou Liu; Jun Fan; Xiaoyun Hu; Yang Hu; Hua Li; Chunni Tang; Lin Sun; Jun Wan
Source:
Journal of materials science 2015 v.50 no.5 pp. 2298-2305
ISSN:
0022-2461
Subject:
gold; nanogold; ultraviolet radiation; electrons; hydrogen production; solar energy; chemical reduction; absorption; fluorescence; energy efficiency; microwave treatment; irradiation; surface plasmon resonance; photocatalysts
Abstract:
... TiO₂nano-grass films were facilely fabricated by a glycerol-assisted hydrothermal process with Ti sheet as precursor. Gold nanoparticles (Au NPs) were then deposited on the surface of TiO₂films by a microwave-assisted chemical reduction route. The investigations reveal that grass-shaped nanostructures of anatase TiO₂films exhibit visible light-capturing property, which can enhance the localized su ...
DOI:
10.1007/s10853-014-8793-z

7. A g-C₃N₄@Au@SrAl₂O₄:Eu²⁺,Dy³⁺ composite as an efficient plasmonic photocatalyst for round-the-clock environmental purification and hydrogen evolution

Author:
Xiaoming Liu; Xueya Chen; Yizu Li; Bingquan Wu; Xubiao Luo; Sheng Ouyang; Shenglian Luo; Abdulaziz A. Al Kheraif; Jun Lin
Source:
Journal of materials chemistry A 2019 v.7 no.32 pp. 19173-19186
ISSN:
2050-7496
Subject:
carbon nitride; energy; gold; hydrogen; hydrogen production; mixing; nanogold; phosphorescence; photocatalysis; photocatalysts; pollutants; sol-gel processing; solar energy; surface plasmon resonance; synergism
Abstract:
... Here, we demonstrate a g-C₃N₄@Au@SrAl₂O₄:Eu²⁺,Dy³⁺ composite as a novel efficient self-luminous visible-light plasmonic photocatalyst for photocatalytic degradation of organic pollutants and hydrogen evolution from water around the clock. The g-C₃N₄@Au@SrAl₂O₄:Eu²⁺,Dy³⁺ composite was prepared by integrating a g-C₃N₄@Au plasmonic photocatalyst composite with a SrAl₂O₄:Eu²⁺,Dy³⁺ long-afterglow phosp ...
DOI:
10.1039/c9ta06423k

8. A multifunctional gold doped Co(OH)₂ electrocatalyst tailored for water oxidation, oxygen reduction, hydrogen evolution and glucose detection

Author:
Md Abu Sayeed; Anthony P. O'Mullane
Source:
Journal of materials chemistry A 2017 v.5 no.45 pp. 23776-23784
ISSN:
2050-7496
Subject:
X-ray photoelectron spectroscopy; active sites; carbon; catalysts; cobalt; electrochemistry; energy; fuel cells; glucose; gold; hydrogen production; oxidation; oxygen; oxygen production; sodium hydroxide
Abstract:
... Electrocatalytic reactions are central to many energy and sensing applications and therefore the development of materials that show functionality for more than one reaction are of significant interest. The synthesis of affordable electrocatalysts for the oxygen evolution reaction (OER) involved in electrochemical water splitting, the oxygen reduction reaction (ORR) for fuel cells in energy researc ...
DOI:
10.1039/c7ta08928g

9. A nano AuTiO₂₋ₓ composite with electrochemical characteristics of under-potential deposition of H (H-UPD) as a highly efficient electrocatalyst for hydrogen evolution

Author:
Zhandong Ren; Lingzhi Jin; Jie Gao; Hanruo Chen; Conghui Zhai; Lingjun Tan; Ning Cong; Hua Fang; Xiaorong Zhou; Yuchan Zhu
Source:
Chemical communications 2019 v.55 no.84 pp. 12695-12698
ISSN:
1364-548X
Subject:
adsorption; catalysts; chemical reactions; electrochemistry; electrodes; energy; gold; hydrogen production; oxygen; titanium dioxide
Abstract:
... An obvious H-UPD for a nano AuTiO₂₋ₓ composite has been found for the first time in terms of the electrochemical characteristics of the Au composite. The electronic effect between Au and TiO₂ and the oxygen vacancy defect would change the adsorption energy of H and HER activity. The HER activity of the AuTiO₂₋ₓ electrode is 6.44 times that of the Au electrode. ...
DOI:
10.1039/c9cc06530j

10. A polymer–metal–polymer–metal heterostructure for enhanced photocatalytic hydrogen production

Author:
Yifeng Zhang; Fang Mao; Hongjian Yan; Kewei Liu; Hongmei Cao; Jiagang Wu; Dingquan Xiao
Source:
Journal of materials chemistry A 2014 v.3 no.1 pp. 109-115
ISSN:
2050-7496
Subject:
X-ray diffraction; aqueous solutions; carbon nitride; gold; hydrogen production; irradiation; photocatalysis; photocatalysts; photoluminescence; platinum; transmission electron microscopy; ultraviolet-visible spectroscopy
Abstract:
... The tightly coupled heterostructure g-C₃N₄/Au/poly(3-hexylthiophene) (P3HT)/Pt was successfully prepared by a self-assembling method. The heterojunction photocatalyst displayed high activity for hydrogen production from water which contains triethanolamine as an electron donor under visible light irradiation. The samples were characterized by X-ray diffraction (XRD), UV-visible spectroscopy, photo ...
DOI:
10.1039/c4ta04636f

11. Achieving overall water splitting on plasmon-based solid Z-scheme photocatalysts free of redox mediators

Author:
Shengyang Wang; Yuying Gao; Yu Qi; Ailong Li; Fengtao Fan; Can Li
Source:
Journal of catalysis 2017 v.354 pp. 250-257
ISSN:
0021-9517
Subject:
electrons; gold; hydrogen; hydrogen production; irradiation; microscopy; nanogold; oxidation; oxygen production; photocatalysis; photocatalysts
Abstract:
... Plasmonic photocatalysis is one of the potential approaches for solar hydrogen production, but successful construction of plasmonic photocatalysts for overall water splitting (OWS) is still a challenge. In this work, we achieved OWS by developing a plasmon-based solid Z-scheme photocatalytic system. Firstly, visible-light responsive plasmonic photocatalysts (Au/TiO2) was demonstrated asa stable an ...
DOI:
10.1016/j.jcat.2017.08.018

12. Activation of solid grinding-derived Au/TiO2 photocatalysts for solar H2 production from water-methanol mixtures with low alcohol content

Author:
Clément Marchal; Alexandre Piquet; Matthieu Behr; Thomas Cottineau; Vasiliki Papaefthimiou; Valérie Keller; Valérie Caps
Source:
Journal of catalysis 2017 v.352 pp. 22-34
ISSN:
0021-9517
Subject:
X-ray photoelectron spectroscopy; air; gold; grinding; heat treatment; hydrogen; hydrogen production; lighting; methanol; mixing; nanocomposites; nanogold; nanoparticles; photocatalysis; photocatalysts; surface area; thermal stability; titanium dioxide
Abstract:
... Au/TiO2 nanocomposites are prepared by the solventless solid grinding method, which consists in mechanically mixing AuPPh3Cl and titania P25 and applying a mild heat treatment to reduce Au (I) into Au (0) nanoparticles (Au NP). Given that gold oxides are not thermally stable, both air and hydrogen can be considered for such treatment. Air however leads to much more efficient photocatalysts than hy ...
DOI:
10.1016/j.jcat.2017.04.035

13. Amorphous molybdenum sulphide @ nanoporous gold as catalyst for hydrogen evolution reaction in acidic environment

Author:
Federico Scaglione; Yanpeng Xue; Federica Celegato; Paola Rizzi; Livio Battezzati
Source:
Journal of materials science 2018 v.53 no.17 pp. 12388-12398
ISSN:
0022-2461
Subject:
catalysts; catalytic activity; electrochemistry; glass; gold; hydrogen; hydrogen production; ligaments; mechanical properties; molybdenum; molybdenum disulfide; nanogold; nanopores; surface area
Abstract:
... A novel catalyst for water splitting has been prepared by cyclic voltammetry (CV) deposition of amorphous MoS₂ on nanoporous gold (NPG) obtained by electrochemical de-alloying a metallic glass precursor, Au₄₀Cu₂₈Ag₇Pd₅Si₂₀ (at.%). As a function of number of CV cycles, Au ligaments are progressively encapsulated by a thin layer of amorphous MoS₂ catalyst for hydrogen evolution. NPG provides a good ...
DOI:
10.1007/s10853-018-2490-2

14. An innovative Au-CdS/ZnS-RGO architecture for efficient photocatalytic hydrogen evolution

Author:
Shuangshuang Kai; Baojuan Xi; Xiaolei Liu; Lin Ju; Peng Wang; Zhenyu Feng; Xiaojian Ma; Shenglin Xiong
Source:
Journal of materials chemistry 2018 v.6 no.7 pp. 2895-2899
ISSN:
2050-7496
Subject:
anisotropy; cadmium; electrons; gold; graphene; graphene oxide; hot water treatment; hydrogen; hydrogen production; irradiation; nanocrystals; nanogold; nanoparticles; nanorods; photocatalysis; zinc; zinc sulfide
Abstract:
... It has been a challenge to design a novel structure for effectively improving the efficiency of charge carriers' separation and transfer. Herein, a CdS/ZnS heterostructure with a tunable Cd/Zn ratio was engineered on reduced graphene oxide (RGO) by a one-pot hydrothermal method followed by in situ formation of Au nanocrystals, which combined the strong electron capture ability of a noble metal and ...
DOI:
10.1039/c7ta10958j

15. Anchoring IrPdAu Nanoparticles on NH₂-SBA-15 for Fast Hydrogen Production from Formic Acid at Room Temperature

Author:
Yixing Luo; Qifeng Yang; Wendan Nie; Qilu Yao; Zhujun Zhang; Zhang-Hui Lu
Source:
ACS applied materials & interfaces 2020 v.12 no.7 pp. 8082-8090
ISSN:
1944-8252
Subject:
alloy nanoparticles; alloys; ambient temperature; carbon dioxide; catalysts; catalytic activity; chemical bonding; energy; formic acid; fuel cells; gold; hydrogen; hydrogen production; iridium; palladium; porous media; renewable energy sources; silica; sodium formate
Abstract:
... Hydrogen (H₂), a regenerable and promising energy carrier, acts as an essential role in the construction of a sustainable energy system. Formic acid (HCOOH, FA), a natural biological metabolic products and also accessible through carbon dioxide (CO₂) reduction, has a great potential to serve as a prospective H₂ supplier for the fuel cell. Herein, ultrafine and electron-rich IrPdAu alloy nanopartic ...
DOI:
10.1021/acsami.9b16981

16. Assessment of clean H2 energy production from water using novel silicon photocatalyst

Author:
Aminul Islam; Siow Hwa Teo; Md. Rabiul Awual; Yun Hin Taufiq-Yap
Source:
Journal of cleaner production 2020 v.244 pp. 118805
ISSN:
0959-6526
Subject:
absorption; gold; hydrogen; hydrogen production; light; nanosheets; oxidation; pH; palladium; photocatalysis; photocatalysts; platinum; rhodium; ruthenium; silicon; wastes; water pollution
Abstract:
... Nanosheets of silicon have attracted a great deal of attention due to its tunable optical and electronic properties. However, the development of facile and easily scalable synthesis process has remained a great contest. Endeavor has been made in this research to find a waste inferred effective photocatalyst to deliver hydrogen (H₂) through visible light responsive water splitting.One-pot solid pha ...
DOI:
10.1016/j.jclepro.2019.118805

17. Au Nanoparticle and CdS Quantum Dot Codecoration of In₂O₃ Nanosheets for Improved H₂ Evolution Resulting from Efficient Light Harvesting and Charge Transfer

Author:
Dandan Ma; Jian-Wen Shi; Diankun Sun; Yajun Zou; Linhao Cheng; Chi He; Zeyan Wang; Chunming Niu
Source:
ACS sustainable chemistry & engineering 2018 v.7 no.1 pp. 547-557
ISSN:
2168-0485
Subject:
catalysts; electrons; gold; hydrogen; hydrogen production; nanogold; nanosheets; photocatalysis; quantum dots; solar radiation
Abstract:
... Au nanoparticle (NP)- and CdS quantum dot (QD)-codecorated In₂O₃ nanosheets, assembled into flowerlike structure (In₂O₃/Au/CdS), were synthesized to facilitate photocatalytic H₂ production. The optimized In₂O₃/Au₄/CdS-12 (4 wt % Au NPs and CdS QDs were deposited for 12 cycles) displays achieved a photocatalytic hydrogen generation ability of 17.23 μmol/h (10 mg of catalyst), which is 22.97, 5.08, ...
DOI:
10.1021/acssuschemeng.8b04086

18. Au(111)-Supported Pt Monolayer as the Most Active Electrocatalyst toward Hydrogen Oxidation and Evolution Reactions in Sulfuric Acid

Author:
Liao Weicheng; Yau Shuehlin
Source:
The Journal of Physical Chemistry C 2017 v.121 no.35 pp. 19218-19225
ISSN:
1932-7455
Subject:
carbon monoxide; catalysts; cost effectiveness; electrodes; fuel cells; gold; hydrogen; hydrogen production; image analysis; oxidation; physical chemistry; platinum; reducing agents; scanning tunneling microscopy; sulfuric acid
Abstract:
... As a subnanometer thick platinum (Pt) film can have catalytic properties different from those of the Pt bulk, the research on the preparation and characterization of a Pt monolayer is fundamentally intriguing and may lead to cost-effective fuel cells. We devise an electroless deposition method to fabricate a Pt monolayer and use scanning tunneling microscopy (STM) to characterize its atomic struct ...
DOI:
10.1021/acs.jpcc.7b05259

19. Au-Pd bimetallic nanoparticles embedded highly porous Fenugreek polysaccharide based micro networks for catalytic applications

Author:
K. Mallikarjuna; Chinna Bathula; G. Dinneswara Reddy; Nabeen K. Shrestha; Haekyoung Kim; Yong-Young Noh
Source:
International journal of biological macromolecules 2019 v.126 pp. 352-358
ISSN:
0141-8130
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; aminophenols; borohydrides; carbon dioxide; catalytic activity; fenugreek; gold; hydrogen production; hydrogenation; industrial applications; nanoparticles; optical properties; p-nitrophenol; palladium; pollution; polysaccharides; remediation; scanning electron microscopy; toxicity; transmission electron microscopy; ultraviolet-visible spectroscopy
Abstract:
... Currently, metallic nanoparticles possessing versatile heterogeneous catalytic functionality such as in hydrogenation, water splitting, hydrogen production and CO₂ reduction for global pollution remediation have been paid great attentions due to their high chemical stability, superior activity and unique electrical and optical properties. However, the gradual degradation of their catalytic activit ...
DOI:
10.1016/j.ijbiomac.2018.12.137

20. Au/Pt co-loaded ultrathin TiO₂ nanosheets for photocatalyzed H₂ evolution by the synergistic effect of plasmonic enhancement and co-catalysis

Author:
Changyu Chen; Long Kuai; Yanjun Chen; Qing Wang; Erjie Kan; Baoyou Geng
Source:
RSC advances 2015 v.5 no.119 pp. 98254-98259
ISSN:
2046-2069
Subject:
catalysts; gold; hydrogen; hydrogen production; nanogold; nanoparticles; nanosheets; photocatalysis; platinum; semiconductors; titanium dioxide
Abstract:
... Co-catalysis and plasmonic enhancement are two efficient ways to improve the photocatalytic performance of semiconductors. In this work, we systematically investigate their synergistic functions by photo-depositing Au and Pt nanoparticles on the surface of ultrathin TiO₂ nanosheets, where Au stimulates the plasmonic effect and Pt acts as the co-catalyst. It was found that both Au and Pt deposition ...
DOI:
10.1039/c5ra17732d

21. Au/PtO nanoparticle-modified g-C3N4 for plasmon-enhanced photocatalytic hydrogen evolution under visible light

Author:
Jing Jiang; Jiaguo Yu; Shaowen Cao
Source:
Journal of colloid and interface science 2016 v.461 pp. 56-63
ISSN:
0021-9797
Subject:
carbon nitride; gold; graphene; hydrogen; hydrogen production; nanogold; nanoparticles; photocatalysis; photocatalysts; renewable energy sources; surface plasmon resonance; synergism
Abstract:
... Photocatalytic hydrogen evolution under visible light is of great potential for renewable energy development. In this work, unalloyed Au/PtO nanoparticle (NP) co-modified graphitic carbon nitride (g-C3N4) photocatalyst is fabricated through a simple photodeposition method. The obtained g-C3N4 composites with co-existed Au and PtO cocatalysts exhibit a considerable enhancement in the photocatalytic ...
DOI:
10.1016/j.jcis.2015.08.076

22. Au/TiO2 Photo(electro)catalysis: The Role of the Au Cocatalyst in Photoelectrochemical Water Splitting and Photocatalytic H2 Evolution

Author:
Reichert Robert; Jusys Zenonas; Behm R. Jürgen
Source:
The Journal of Physical Chemistry C 2015 v.119 no.44 pp. 24750-24759
ISSN:
1932-7455
Subject:
catalysts; electric current; electrochemistry; electrodes; electrons; glass; gold; hydrogen; hydrogen production; light intensity; mass spectrometry; mass transfer; methanol; nanocrystals; nanogold; oxidation; oxygen; photocatalysis; physical chemistry
Abstract:
... Photoelectrochemical water oxidation and photocatalytic H₂ evolution on planar nanocrystalline Au/TiO₂ catalyst film electrodes were studied by combined electrochemistry and online mass spectrometry, allowing for the detection and quantification of the volatile reaction products O₂ and H₂, and thus, by comparison with the photocurrent, to determine selectivities and to map out contributions from s ...
DOI:
10.1021/acs.jpcc.5b08428

23. Au25-Loaded BaLa4Ti4O15 Water-Splitting Photocatalyst with Enhanced Activity and Durability Produced Using New Chromium Oxide Shell Formation Method

Author:
Wataru Kurashige; Rina Kumazawa; Daiki Ishii; Rui Hayashi; Yoshiki Niihori; Sakiat Hossain; Lakshmi V. Nair; Tomoaki Takayama; Akihide Iwase; Seiji Yamazoe; Tatsuya Tsukuda; Akihiko Kudo; Yuichi Negishi
Source:
Journal of physical chemistry 2018 v.122 no.25 pp. 13669-13681
ISSN:
1932-7455
Subject:
chromic oxide; durability; gold; hydrogen production; oxygen; photocatalysis; photocatalysts; physical chemistry; protons
Abstract:
... We report herein remarkable improvement of activity and stability of an Au₂₅-loaded BaLa₄Ti₄O₁₅ water-splitting photocatalyst. We first examined the influence of refining the gold cocatalyst on the individual reactions over the BaLa₄Ti₄O₁₅ photocatalyst in this water-splitting system. The results revealed that refining the gold cocatalyst accelerates not only the hydrogen generation reaction, but ...
DOI:
10.1021/acs.jpcc.8b00151

24. Au@Pd core–shell nanoclusters growing on nitrogen-doped mildly reduced graphene oxide with enhanced catalytic performance for hydrogen generation from formic acid

Author:
Zhi-Li Wang; Jun-Min Yan; Hong-Li Wang; Yun Ping; Qing Jiang
Source:
Journal of materials chemistry A 2013 v.1 no.41 pp. 12721-12725
ISSN:
2050-7496
Subject:
alloys; ambient temperature; aqueous solutions; catalytic activity; formic acid; gold; graphene oxide; hydrogen production; nanoparticles; palladium; reducing agents; surfactants
Abstract:
... Here we report a green and facile strategy for the direct nucleation and growth of ultrafine (1.8 nm) and well dispersed Au@Pd core–shell nanoclusters on nitrogen-doped mildly reduced graphene oxide (Au@Pd/N–mrGO) without any surfactant and additional reducing agent. During the synthesis, N–mrGO acts as both the reducing agent and support by taking advantage of its moderate reducing and high dispe ...
DOI:
10.1039/c3ta12531a

25. Au@TiO2–CdS Ternary Nanostructures for Efficient Visible-Light-Driven Hydrogen Generation

Author:
Fang Jun; Xu Lin; Zhang Zhenyi; Yuan Yupeng; Cao Shaowen; Wang Zheng; Yin Lisha; Liao Yusen; Xue Can
Source:
ACS Applied Materials & Interfaces 2013 v.5 no.16 pp. 8088-8092
ISSN:
1944-8252
Subject:
electron transfer; electrons; gold; hydrogen production; irradiation; nanocrystals; nanogold; nanoparticles; photocatalysis; photocatalysts; solar energy; titanium dioxide
Abstract:
... We report a new type of Au@TiO₂–CdS ternary nanostructure by decorating CdS nanoparticles onto Au@TiO₂ core–shell structures. In comparison to that of binary structures such as CdS–TiO₂ and Au@TiO₂, these ternary nanostructures exhibit a remarkably high photocatalytic H₂-generation rate under visible-light irradiation. The enhanced photocatalytic activity is attributed to the unique ternary design ...
DOI:
10.1021/am4021654

26. AuPd Nanoparticles Anchored on Nitrogen-Decorated Carbon Nanosheets with Highly Efficient and Selective Catalysis for the Dehydrogenation of Formic Acid

Author:
Yiqun Jiang; Xiulin Fan; Man Chen; Xuezhang Xiao; Yiwen Zhang; Chuntao Wang; Lixin Chen
Source:
Journal of physical chemistry 2018 v.122 no.9 pp. 4792-4801
ISSN:
1932-7455
Subject:
ambient temperature; carbon; catalysts; catalytic activity; dehydrogenation; formic acid; gold; hydrogen; hydrogen production; nanoparticles; nanosheets; nitrides; nitrogen; palladium; physical chemistry
Abstract:
... Formic acid (FA), a sustainable and safe hydrogen storage vector, has the advantages of nontoxicity, high hydrogen content (4.4 wt %) and low cost. However, the dehydrogenation of formic acid at near room temperature remains a big challenge in terms of favorable hydrogen release rate and CO-absence hydrogen production. Herein, a series of nitrogen-decorated carbon nanosheets (n-CNS) supported AuPd ...
DOI:
10.1021/acs.jpcc.8b00082

27. Au–Pd alloy catalyst with high performance for hydrogen generation from formic acid-formate solution at nearly 0 °C

Author:
Shuang Wu; Fan Yang; Pingchuan Sun; Tiehong Chen
Source:
RSC advances 2014 v.4 no.84 pp. 44500-44503
ISSN:
2046-2069
Subject:
alloy nanoparticles; alloys; ambient temperature; catalysts; gold; hydrogen production; palladium; soot
Abstract:
... By reduction of mixed noble metal precursors in aqueous phase under ice-water bath conditions, well dispersed Au–Pd alloy nanoparticles supported on carbon black were facilely prepared. The catalyst exhibited high activity and selectivity at nearly 0 °C, with an initial turnover frequency (TOF) up to 635 h⁻¹. At room temperature the initial TOF of the catalyst reached 1075 h⁻¹, which is rather hig ...
DOI:
10.1039/c4ra08389j

28. Au–Pt alloy nanoparticles site-selectively deposited on CaIn₂S₄ nanosteps as efficient photocatalysts for hydrogen production

Author:
Jianjun Ding; Xiangyang Li; Lin Chen; Xian Zhang; Song Sun; Jun Bao; Chen Gao; Xingyou Tian
Source:
Journal of materials chemistry A 2016 v.4 no.32 pp. 12630-12637
ISSN:
2050-7496
Subject:
alloy nanoparticles; gold; hydrogen; hydrogen production; irradiation; light; nanogold; oxidation; photocatalysis; photocatalysts; platinum; sulfides
Abstract:
... Au–Pt/CaIn₂S₄ composites were synthesized for the first time using the photoreduction method by which bimetallic Au–Pt alloy nanoparticles were in situ site-selectively photoreduced on the edges of monoclinic CaIn₂S₄ nanosteps. The Au–Pt alloy nanoparticles as cocatalysts can spatially separate the oxidation and reduction sites and effectively enhance the photocatalytic hydrogen activity of CaIn₂S ...
DOI:
10.1039/c6ta04468a

29. Best Practice for Evaluating Electrocatalysts for Hydrogen Economy

Author:
Matthew A. Bird; Sean E. Goodwin; Darren A. Walsh
Source:
ACS applied materials & interfaces 2020 v.12 no.18 pp. 20500-20506
ISSN:
1944-8252
Subject:
X-ray photoelectron spectroscopy; carbon; carbon electrodes; carbon nanotubes; catalysts; catalytic activity; electrochemistry; energy; energy-dispersive X-ray analysis; fuel cells; glass; gold; hydrogen; hydrogen production; mass spectrometry; molybdenum disulfide; platinum; screening; voltammetry
Abstract:
... Screening new electrocatalysts is key to the development of new materials for next-generation energy devices such as fuel cells and electrolyzers. The counter electrodes used in such tests are often made from materials such as Pt and Au, which can dissolve during testing and deposit onto test electrocatalysts, resulting in inaccurate results. The most common strategy for preventing this effect is ...
DOI:
10.1021/acsami.0c03307

30. Bifunctional electrocatalysis for CO₂ reduction via surface capping-dependent metal–oxide interactions

Author:
Yueshen Wu; Xiaolei Yuan; Zixu Tao; Hailiang Wang
Source:
Chemical communications 2019 v.55 no.60 pp. 8864-8867
ISSN:
1364-548X
Subject:
carbon dioxide; carbon monoxide; catalysts; catalytic activity; cetyltrimethylammonium bromide; chemical interactions; citrates; electrochemistry; formates; gold; hydrogen; hydrogen production; ligands; nanogold; oxidation; tin dioxide
Abstract:
... Multi-component materials are a new trend in catalyst development for electrochemical CO₂ reduction. Understanding and managing the chemical interactions within a complex catalyst structure may unlock new or improved reactivity, but is scientifically challenging. We report the first example of capping ligand-dependent metal–oxide interactions in Au/SnO₂ structures for electrocatalytic CO₂ reductio ...
DOI:
10.1039/c9cc02934f

31. Bimetallic Au–Pt/TiO₂ photocatalysts active under UV-A and simulated sunlight for H₂ production from ethanol

Author:
Alessandro Gallo; Marcello Marelli; Rinaldo Psaro; Valentina Gombac; Tiziano Montini; Paolo Fornasiero; Roberta Pievo; Vladimiro Dal Santo
Source:
Green chemistry 2012 v.14 no.2 pp. 330-333
ISSN:
1463-9270
Subject:
absorption; ethanol; gold; hydrogen; hydrogen production; irradiation; light; lighting; methanol; nanoparticles; oxygen; photocatalysts; platinum; titanium; titanium dioxide; ultraviolet radiation
Abstract:
... A new class of bimetallic Au–Pt/TiO₂ photocatalysts were developed and employed in H₂ photoassisted production using ethanol as a sacrificial reagent both under UV-A and simulated sunlight irradiation. Remarkably, preliminary experiments show promising hydrogen evolution under visible light using Au0.5–Pt0.5/TiO₂ with methanol. The presence of bimetallic Au–Pt nanoparticles and the TiO₂ visible li ...
DOI:
10.1039/c2gc16112e

32. Bimetallic PtAu Alloy Nanoparticles-Integrated g-C₃N₄ Hybrid as an Efficient Photocatalyst for Water-to-Hydrogen Conversion

Author:
Kousik Bhunia; Moumita Chandra; Santimoy Khilari; Debabrata Pradhan
Source:
ACS applied materials & interfaces 2018 v.11 no.1 pp. 478-488
ISSN:
1944-8252
Subject:
absorption; alloys; carbon nitride; gold; graphene; hydrogen; hydrogen production; nanogold; nanoparticles; photocatalysis; photocatalysts; platinum
Abstract:
... Herein, we report the synthesis of metal (Pt and Au) and metal alloy (PtAu) nanoparticles (NPs)-integrated graphitic carbon nitride (g-C₃N₄) hybrids using a facile solvothermal route for water-splitting application. The metal and metal alloy NPs with varying percentages of Pt and Au are found to be in the size range of 3–5 nm and uniformly distributed on the g-C₃N₄ sheets. The metal and metal allo ...
DOI:
10.1021/acsami.8b12183

33. Bioinspired self-standing macroporous Au/ZnO sponges for enhanced photocatalysis

Author:
Ping She; Kongliang Xu; Shengyan Yin; Yinxing Shang; Qinrong He; Shan Zeng; Hang Sun; Zhenning Liu
Source:
Journal of colloid and interface science 2018 v.514 pp. 40-48
ISSN:
0021-9797
Subject:
energy conversion; gold; hydrogen production; irradiation; nanorods; photocatalysis; photocatalysts; polyurethanes; porous media; ultraviolet radiation; wavelengths; zinc oxide
Abstract:
... A self-standing macroporous noble metal-zinc oxide (ZnO) sponge of robust 3D network has been fabricated through in-situ growth method. The key to the construction of the bioinspired sponge lies in the choice of commercial polyurethane sponge (CPS) with interconnected and junction-free macroporous structure as the skeleton to support Au/ZnO nanorods (Au/ZnONRs). The resultant Au/ZnO/CPS not only e ...
DOI:
10.1016/j.jcis.2017.12.003

34. Calixarene-Based {Ni18} Coordination Wheel: Highly Efficient Electrocatalyst for the Glucose Oxidation and Template for the Homogenous Cluster Fabrication

Author:
Shentang Wang; Xiaohui Gao; Xinxin Hang; Xiaofei Zhu; Haitao Han; Xiaokun Li; Wuping Liao; Wei Chen
Source:
Journal of the American Chemical Society 2018 v.140 no.20 pp. 6271-6277
ISSN:
1520-5126
Subject:
active sites; air; catalysts; catalytic activity; cations; electrochemistry; encapsulation; energy; fuel cells; glucose; gold; hydrogen production; iridium; nanogold; nanoparticles; nickel; nitrogen; oxidation; oxygen; palladium; platinum; rhodium; ruthenium; sulfur; wheels
Abstract:
... Catalyst plays a very important role in the exploration of new energy. To obtain a highly efficient electrocatalyst for the glucose oxidation and tiny metal nanocluster catalysts, a calixarene-based {Ni₁₈} coordination wheel with sulfur atoms on the cavity surface was designed, synthesized, and used as the porous template. Contributing from the active sites of nickel cations, the as-synthesized co ...
DOI:
10.1021/jacs.7b13193

35. Carbon vacancy defect-activated Pt cluster for hydrogen generation

Author:
Xiaobing Bao; Yutong Gong; Yuzhuo Chen; Hao Zhang; Zhe Wang; Shanjun Mao; Lei Xie; Zheng Jiang; Yong Wang
Source:
Journal of materials chemistry A 2019 v.7 no.25 pp. 15364-15370
ISSN:
2050-7496
Subject:
carbon; carbon nanotubes; catalysts; electrochemistry; gold; hydrogen production; oxidation; palladium; platinum
Abstract:
... Providing specific accommodation for supported metal clusters on the defective sites of supports is vital to disclose the function mechanism of the structural defects on metals and the fabrication of excellent catalysts. Here, stable platinum-group metal clusters (Pt, Pd and Au) trapped by structure defects within carbon nanotubes (CNTs) were fabricated with a simple and scalable in situ electroch ...
DOI:
10.1039/c9ta04010b

36. Catalytic Activity of Gold Clusters Supported on the h-BN/Au(111) Surface for the Hydrogen Evolution Reaction

Author:
Min Gao; Maki Nakahara; Andrey Lyalin; Tetsuya Taketsugu
Source:
Journal of physical chemistry 2021 v.125 no.2 pp. 1334-1344
ISSN:
1932-7455
Subject:
boron nitride; catalytic activity; chemical reactions; gold; hydrogen production
Abstract:
... It is demonstrated that small gold clusters stabilized on the h-BN/Au(111) support can exhibit high catalytic activity for the hydrogen evolution reaction (HER). Hexagonal boron nitride (h-BN) is usually considered as an inert and insulating support; however, the interaction of a single-layer h-BN with an underlying Au(111) substrate promotes its chemical reactivity, resulting in relatively strong ...
DOI:
10.1021/acs.jpcc.0c08826

37. Comparative activity of CdS nanofibers superficially modified by Au, Cu, and Ni nanoparticles as co‐catalysts for photocatalytic hydrogen production under visible light

Author:
Socorro Oros‐Ruiz; Agileo Hernández‐Gordillo; Cinthia García‐Mendoza; Arturo A Rodríguez‐Rodríguez; Ricardo Gómez
Source:
Journal of chemical technology and biotechnology 2016 v.91 no.8 pp. 2205-2210
ISSN:
0268-2575
Subject:
catalysts; copper; gold; hydrogen production; nanofibers; nanoparticles; nickel; oxidation; photocatalysis; semiconductors
Abstract:
... BACKGROUND: The use of CdS as a catalyst under visible light for hydrogen production has attracted much attention owing to its ability to perform the photocatalytic hydrogen production under visible light; the use of noble metals as co‐catalysts has been reported as an effective method to increase their efficiency. This work compares the activity of CdS catalysts using different metals as co‐catal ...
DOI:
10.1002/jctb.4992

38. Competition between CO₂ Reduction and Hydrogen Evolution on a Gold Electrode under Well-Defined Mass Transport Conditions

Author:
Akansha Goyal; Giulia Marcandalli; Vladislav A. Mints; Marc T. M. Koper
Source:
Journal of the American Chemical Society 2020 v.142 no.9 pp. 4154-4161
ISSN:
1520-5126
Subject:
alkalinity; bicarbonates; carbon dioxide; carbon monoxide; catalysts; electrochemistry; electrodes; electrolytes; gold; hydrogen production; mass transfer; pH
Abstract:
... Gold is one of the most selective catalysts for the electrochemical reduction of CO₂ (CO2RR) to CO. However, the concomitant hydrogen evolution reaction (HER) remains unavoidable under aqueous conditions. In this work, a rotating ring disk electrode (RRDE) setup has been developed to study quantitatively the role of mass transport in the competition between these two reactions on the Au surface in ...
DOI:
10.1021/jacs.9b10061
PubMed:
32041410
PubMed Central:
PMC7059182

39. Composite plasmonic gold/layered double hydroxides and derived mixed oxides as novel photocatalysts for hydrogen generation under solar irradiation

Author:
Gabriela Carja; Mihaela Birsanu; Kiyoshi Okada; Hermenegildo Garcia
Source:
Journal of materials chemistry A 2013 v.1 no.32 pp. 9092-9098
ISSN:
2050-7496
Subject:
absorption; ambient temperature; aqueous solutions; cerium; clay; gold; hydrogen production; hydroxides; light intensity; nanogold; oxides; photocatalysis; photocatalysts; porous media; solar radiation; surface plasmon resonance
Abstract:
... We report here the self-assembly of Au nanoparticles/mesoporous matrices of layered double hydroxides (Au/ZnAlLDH and Au/ZnCeAlLDH) and the derived mixed oxides as novel plasmonic photocatalysts for H₂ production from water–methanol mixtures (80 : 20) by using solar irradiation, at room temperature. The fabrication of the Au/LDH composite is based on the formation of Au nanoparticles on the surfac ...
DOI:
10.1039/c3ta11569k

40. Computational Screening of Electrocatalytic Activity of Transition Metal-Doped CdS Nanotubes for Water Splitting

Author:
Priyanka Garg; Akhil S. Nair; Kuber Singh Rawat; Biswarup Pathak
Source:
Journal of physical chemistry 2019 v.123 no.22 pp. 13419-13427
ISSN:
1932-7455
Subject:
adsorption; cadmium sulfide; catalysts; catalytic activity; cobalt; copper; copper nanoparticles; gold; hydrogen production; iridium; iron; nanogold; nanosilver; nanotubes; nickel; osmium; oxygen production; palladium; platinum; rhodium; ruthenium; screening; silver
Abstract:
... Exploring novel catalyst materials for water-splitting reaction is far-reaching in the current research scenario. CdS-derived nanostructures have been identified as potential catalysts for water splitting for decades. Realizing the competence of transition-metal (TM) doping in the desirable tuning of the properties of nanostructures, we have studied the catalytic activity of late TM (TM = Fe, Co, ...
DOI:
10.1021/acs.jpcc.9b01589

41. Computational Screening of Electrocatalytic Materials for Hydrogen Evolution: Platinum Monolayer on Transitional Metals

Author:
Xi-Bo Li; Tengfei Cao; Feipeng Zheng; Xiaobo Chen
Source:
Journal of physical chemistry 2018 v.123 no.1 pp. 495-503
ISSN:
1932-7455
Subject:
adsorption; electrochemistry; gold; hydrogen; hydrogen production; iron; moieties; palladium; platinum; rhenium; screening; silver
Abstract:
... Searching for none or less Pt-containing electrocatalytic materials for hydrogen evolution is a promising way to reduce the cost of hydrogen production. Thus, a computational screening of electrocatalytic materials for hydrogen evolution reaction (HER), Pt monolayer on transitional metals (Pt/TM), are carried out by DFT in this work. According to several prerequisites, including difficulty of synt ...
DOI:
10.1021/acs.jpcc.8b09301

42. Confinement of Hydrogen Molecules at Graphene–Metal Interface by Electrochemical Hydrogen Evolution Reaction

Author:
Satoshi Yasuda; Kazuhisa Tamura; Tomo-o Terasawa; Masahiro Yano; Hideaki Nakajima; Takahiro Morimoto; Toshiya Okazaki; Ryuushi Agari; Yasufumi Takahashi; Masaru Kato; Ichizo Yagi; Hidehito Asaoka
Source:
Journal of physical chemistry 2020 v.124 no.9 pp. 5300-5307
ISSN:
1932-7455
Subject:
Raman spectroscopy; electrochemistry; electrodes; energy; gold; graphene; hydrogen; hydrogen production; nanobubbles; nanogold; permeability; physical chemistry; protons; roughness; scanning tunneling microscopy
Abstract:
... Confinement of hydrogen molecules at graphene–substrate interface has presented significant importance from the viewpoints of development of fundamental understanding of two-dimensional material interface and energy storage system. In this study, we investigate H₂ confinement at a graphene–Au interface by combining selective proton permeability of graphene and the electrochemical hydrogen evolutio ...
DOI:
10.1021/acs.jpcc.0c00995

43. Constructing functionalized plasmonic gold/titanium dioxide nanosheets with small gold nanoparticles for efficient photocatalytic hydrogen evolution

Author:
Lei Cheng; Dainan Zhang; Yulong Liao; Fei Li; Huaiwu Zhang; Quanjun Xiang
Source:
Journal of colloid and interface science 2019 v.555 pp. 94-103
ISSN:
0021-9797
Subject:
adsorption; gold; growth retardation; hydrogen production; lighting; nanogold; nanosheets; photocatalysis; photocatalysts; surface plasmon resonance; temperature; titanium dioxide; urea; xenon
Abstract:
... Small plasmonic Au nanoparticles (NPs)-decorated with TiO2 nanosheets were fabricated to improve the photocatalytic performance. The Au/TiO2 nanosheets with Au NPs of different sizes ranging from ∼3 nm to 28 nm were prepared by using hydrothermally obtained TiO2 nanosheets as substrate via urea and light reduction method. During synthesis, the obtained Au NPs through urea reduction treatment in di ...
DOI:
10.1016/j.jcis.2019.07.060

44. Contact and Support Considerations in the Hydrogen Evolution Reaction Activity of Petaled MoS2 Electrodes

Author:
Finn Shane T.; Macdonald Janet E.
Source:
ACS Applied Materials & Interfaces 2016 v.8 no.38 pp. 25185-25192
ISSN:
1944-8252
Subject:
gold; hydrogen production; electrodes; molybdenum; transmission electron microscopy; hydrogen; geometry; Raman spectroscopy; X-radiation
Abstract:
... Petaled MoS₂ electrodes grown hydrothermally from Mo foils are found to have an 800 nm, intermediate, MoSₓOy layer. Similar petaled MoS₂ films without this intermediate layer are grown on Au. X-ray photoelectron and Raman spectroscopies and transmission electron microscopy indicate the resulting petaled multilayer MoS₂ films are frayed and exhibit single-layer, 1T-MoS₂ behavior at the edges. We co ...
DOI:
10.1021/acsami.6b05101

45. Controlled Growth and Grafting of High-Density Au Nanoparticles on Zinc Oxide Thin Films by Photo-Deposition

Author:
Jérémy Cure; Hala Assi; Kévin Cocq; Lorena Marìn; Katia Fajerwerg; Pierre Fau; Eric Bêche; Yves J. Chabal; Alain Estève; Carole Rossi
Source:
Langmuir 2018 v.34 no.5 pp. 1932-1940
ISSN:
1520-5827
Subject:
X-ray photoelectron spectroscopy; decontamination; electron microscopy; gold; hydrogen production; nanogold; nanoparticles; photocatalysis; zinc oxide
Abstract:
... The integration of high-purity nano-objects on substrates remains a great challenge for addressing scaling-up issues in nanotechnology. For instance, grafting gold nanoparticles (NPs) on zinc oxide films, a major step process for catalysis or photovoltaic applications, still remains difficult to master. We report a modified photodeposition (P-D) approach that achieves tight control of the NPs size ...
DOI:
10.1021/acs.langmuir.7b04105

46. Controlled-Potential Simulation of Elementary Electrochemical Reactions: Proton Discharge on Metal Surfaces

Author:
Georg Kastlunger; Per Lindgren; Andrew A. Peterson
Source:
Journal of physical chemistry 2018 v.122 no.24 pp. 12771-12781
ISSN:
1932-7455
Subject:
density functional theory; electrochemistry; electrodes; electrons; energy; gold; hydrogen; hydrogen production; models; physical chemistry; platinum; solvents
Abstract:
... The simulation of electrochemical reaction dynamics from first principles remains challenging, since over the course of an elementary step, an electron is either consumed or produced by the electrode. For example, the hydrogen evolution reaction begins with a simple proton discharge to a metal surface, but with conventional electronic structure methods, the simulated potential, which is manifested ...
DOI:
10.1021/acs.jpcc.8b02465

47. Core–shell and alloy integrating PdAu bimetallic nanoplates on reduced graphene oxide for efficient and stable hydrogen evolution catalysts

Author:
Yi Jiang; Yucong Yan; Yu Han; Hui Zhang; Deren Yang
Source:
RSC advances 2017 v.7 no.69 pp. 43373-43379
ISSN:
2046-2069
Subject:
alloys; aqueous solutions; ascorbic acid; catalysts; catalytic activity; durability; gold; graphene; graphene oxide; hydrogen production; nanogold; palladium; reducing agents
Abstract:
... PdAu bimetallic nanoplates are synthesized by titrating HAuCl₄ into an aqueous solution containing in situ generated Pd square nanoplates (PdSPs) on reduced graphene oxide (rGO) in the presence of ascorbic acid (AA), serving as a reducing agent, at different injection rates. At a high injection rate (e.g., 45 mL min⁻¹), PdAu core–shell nanoplates on rGO are generated by strong galvanic replacement ...
DOI:
10.1039/c7ra08517f

48. Correlation between Gas Bubble Formation and Hydrogen Evolution Reaction Kinetics at Nanoelectrodes

Author:
Qianjin Chen; Long Luo
Source:
Langmuir 2018 v.34 no.15 pp. 4554-4559
ISSN:
1520-5827
Subject:
bubbles; electrodes; gold; hydrogen; hydrogen production; nanogold; nanoparticles; platinum; reaction kinetics; theoretical models
Abstract:
... We report the correlation between H₂ gas bubble formation potential and hydrogen evolution reaction (HER) activity for Au and Pt nanodisk electrodes (NEs). Microkinetic models were formulated to obtain the HER kinetic information for individual Au and Pt NEs. We found that the rate-determining steps for the HER at Au and Pt NEs were the Volmer step and the Heyrovsky step, respectively. More intere ...
DOI:
10.1021/acs.langmuir.8b00435

49. Cu2ZnSnS4-Pt and Cu2ZnSnS4-Au Heterostructured Nanoparticles for Photocatalytic Water Splitting and Pollutant Degradation

Author:
Yu Xuelian; Shavel Alexey; An Xiaoqiang; Luo Zhishan; Ibáñez Maria; Cabot Andreu
Source:
Journal of the American Chemical Society 2014 v.136 no.26 pp. 9236-9239
ISSN:
1520-5126
Subject:
copper; energy conversion; gold; hydrogen production; nanoparticles; photocatalysis; platinum; pollutants; solar energy; sulfides; tin; zinc
Abstract:
... Cu₂ZnSnS₄, based on abundant and environmental friendly elements and with a direct band gap of 1.5 eV, is a main candidate material for solar energy conversion through both photovoltaics and photocatalysis. We detail here the synthesis of quasi-spherical Cu₂ZnSnS₄ nanoparticles with unprecedented narrow size distributions. We further detail their use as seeds to produce CZTS-Au and CZTS-Pt heteros ...
DOI:
10.1021/ja502076b

50. Decoration of Carbon Nitride Surface with Bimetallic Nanoparticles (Ag/Pt, Ag/Pd, and Ag/Au) via Galvanic Exchange for Hydrogen Evolution Reaction

Author:
Nazir Roshan; Fageria Pragati; Basu Mrinmoyee; Pande Surojit
Source:
The Journal of Physical Chemistry C 2017 v.121 no.36 pp. 19548-19558
ISSN:
1932-7455
Subject:
X-ray photoelectron spectroscopy; alloys; carbon nitride; catalysts; energy-dispersive X-ray analysis; gold; hydrogen production; ions; nanoparticles; nanosilver; palladium; physical chemistry; platinum; scanning electron microscopy; silver; sulfuric acid; transmission electron microscopy
Abstract:
... Here, we propose the synthesis of AgPt, AgPd, and AgAu bimetallic nanoparticles (NPs) on a carbon nitride (C₃N₄) surface via a galvanic exchange technique for the hydrogen evolution reaction (HER). Prior to the synthesis of C₃N₄/AgPt, AgPd, and AgAu, Ag NPs were synthesized on a C₃N₄ surface. For the synthesis of Ag NPs, initially Ag⁺ ions were adsorbed and then reduced by NaBH₄ resulting in the d ...
DOI:
10.1021/acs.jpcc.7b04595

51. Decoration of Micro-/Nanoscale Noble Metal Particles on 3D Porous Nickel Using Electrodeposition Technique as Electrocatalyst for Hydrogen Evolution Reaction in Alkaline Electrolyte

Author:
Qian Xin; Hang Tao; Shanmugam Sangaraju; Li Ming
Source:
ACS applied materials 2015 v.7 no.29 pp. 15716-15725
ISSN:
1944-8252
Subject:
catalytic activity; dielectric spectroscopy; durability; electrochemistry; electrodes; electrolysis; electrolytes; gold; hydrogen production; nickel; platinum; scanning electron microscopy; silver; surface area
Abstract:
... Micro-/nanoscale noble metal (Ag, Au, and Pt) particle-decorated 3D porous nickel electrodes for hydrogen evolution reaction (HER) in alkaline electrolyte are fabricated via galvanostatic electrodeposition technique. The developed electrodes are characterized by field emission scanning electron microscopy and electrochemical measurements including Tafel polarization curves, cyclic voltammetry, and ...
DOI:
10.1021/acsami.5b00679

52. Design and fabrication of size-controlled Pt–Au bimetallic alloy nanostructure in carbon nanofibers: a bifunctional material for biosensors and the hydrogen evolution reaction

Author:
Bin Zhang; Han Zhu; MeiLing Zou; XinRong Liu; Hui Yang; Ming Zhang; WeiWei Wu; JuMing Yao; MingLiang Du
Source:
Journal of materials science 2017 v.52 no.13 pp. 8207-8218
ISSN:
0022-2461
Subject:
alloys; biosensors; carbon nanofibers; durability; electron transfer; gold; hydrogen peroxide; hydrogen production; nanogold; nanoparticles; platinum
Abstract:
... Small-sized and well-dispersed Pt–Au nanoparticles (Pt–AuNPs) grown on carbon nanofibers (Pt–AuNPs/CNFs) with excellent electroanalytical and electrocatalytic performance in the detection of H₂O₂ and the catalytic hydrogen evolution reaction (HER) were designed and fabricated via electrospinning technology and an in situ thermal reduction process. Large numbers of Pt–AuNPs were homogenously distri ...
DOI:
10.1007/s10853-017-1030-9

53. Digital versatile disc bipolar electrode: A fast and low-cost approach for visual sensing of analytes and electrocatalysts screening

Author:
Mohsen Shayan; Abolfazl Kiani
Source:
Analytica chimica acta 2015 v.888 pp. 52-58
ISSN:
0003-2670
Subject:
analytical chemistry; benzoquinones; catalysts; electrodes; gold; hydrogen peroxide; hydrogen production; oxidation; palladium; platinum; screening; silver
Abstract:
... This work represents a new, extremely low cost and easy method for fabrication of bipolar electrode (BPE) for rapid and simultaneous screening of potential candidates for electrocatalytic reactions and sensing applications. Our method takes advantage of the silver reflective layer deposited on already available recordable digital versatile disc (DVD-R) polycarbonate substrate which acts as BPE. Ox ...
DOI:
10.1016/j.aca.2015.07.014

54. Direct Visualization of Au Atoms Bound to TiO2(110) O-Vacancies

Author:
Mellor Andrew; Humphrey David; Yim Chi M.; Pang Chi L.; Idriss Hicham; Thornton Geoff
Source:
The Journal of Physical Chemistry C 2017 v.121 no.44 pp. 24721-24725
ISSN:
1932-7455
Subject:
carbon monoxide; catalysts; catalytic activity; gold; hydrogen production; models; nanogold; oxidation; oxygen; physical chemistry; scanning tunneling microscopy; titanium dioxide; transmission electron microscopy
Abstract:
... Au nanoparticles supported on reducible metal oxide surfaces are known to be active catalysts for a number of reactions including CO oxidation and hydrogen production. The exact choice of a metal oxide support has been shown to have a marked impact on activity, suggesting that interactions between Au and the support play a key role in catalysis. For TiO₂, a model substrate for Au catalysis, it had ...
DOI:
10.1021/acs.jpcc.7b09608
PubMed:
29152035
PubMed Central:
PMC5682598

55. Donor-Dependent Kinetics of Interfacial Proton-Coupled Electron Transfer

Author:
Jackson Megan N.; Surendranath Yogesh
Source:
Journal of the American Chemical Society 2016 v.138 no.9 pp. 3228-3234
ISSN:
1520-5126
Subject:
Gibbs free energy; acetonitrile; catalytic activity; electrodes; electrolytes; electron transfer; energy conversion; gold; hydrogen production; isotopes
Abstract:
... The effect of the proton donor on the kinetics of interfacial concerted proton–electron transfer (CPET) to polycrystalline Au was probed indirectly by studying the rate of hydrogen evolution from trialkylammonium donors with different steric profiles, but the same pKₐ. Detailed kinetic studies point to a mechanism for HER catalysis that involves rate-limiting CPET from the proton donor to the elec ...
DOI:
10.1021/jacs.6b00167

56. Dynamic photocatalytic hydrogen production from ethanol–water mixtures in an optical fiber honeycomb reactor loaded with Au/TiO2

Author:
Elena Taboada; Inma Angurell; Jordi Llorca
Source:
Journal of catalysis 2014 v.309 pp. 460-467
ISSN:
0021-9517
Subject:
acetaldehyde; adsorption; combs (social insects); ethanol; gases; gold; hydrogen; hydrogen production; liquids; nanogold; optical fibers; particle size; photocatalysis; photocatalysts; slurries; temperature; titanium dioxide
Abstract:
... Cordierite honeycombs loaded with different amounts of Au/TiO2 have been used in an optical fiber photoreactor illuminated with UV LEDs to produce hydrogen from ethanol and water–ethanol mixtures. The photoreactions have been carried out at 298–348K, volume hourly space velocities of 300–2100h⁻¹, Au contents of 0.5–2wt.% with respect to TiO2, and ethanol molar contents of 1–100%. Excellent dispers ...
DOI:
10.1016/j.jcat.2013.10.025

57. Effect of Single-Atom Cocatalysts on the Activity of Faceted TiO₂ Photocatalysts

Author:
Tingcha Wei; Yanan Zhu; Yuxuan Wu; Xiaoqiang An; Li-Min Liu
Source:
Langmuir 2018 v.35 no.2 pp. 391-397
ISSN:
1520-5827
Subject:
electrons; gold; hydrogen; hydrogen production; photocatalysis; photocatalysts; platinum; titanium dioxide
Abstract:
... The synergetic contribution of crystal facets and atomic cocatalysts toward the photoactivity of TiO₂ was fundamentally investigated. Atomic-level dispersed Pt and Au were deposited onto 001-faceted and 101-faceted TiO₂, separately. When used as photocatalysts for photocatalytic H₂ production, Pt/TiO₂-001 showed 1156 and 3 times higher H₂ evolution rate than that of cocatalyst-free TiO₂-001 and Pt ...
DOI:
10.1021/acs.langmuir.8b03488

58. Effect of Thickness of Chromium Hydroxide Layer on Ag Cocatalyst Surface for Highly Selective Photocatalytic Conversion of CO₂ by H₂O

Author:
Rui Pang; Kentaro Teramura; Hiroyuki Asakura; Saburo Hosokawa; Tsunehiro Tanaka
Source:
ACS sustainable chemistry & engineering 2018 v.7 no.2 pp. 2083-2090
ISSN:
2168-0485
Subject:
carbon dioxide; carbon monoxide; carbonates; chromium; copper; gold; hydrogen; hydrogen production; palladium; photocatalysis; photocatalysts; platinum; silver
Abstract:
... In this study, we developed a Ag–Cr core–shell-structured (Ag@Cr) cocatalyst that modified the surface of the Ga₂O₃ photocatalyst. Compared to results provided by modifications with Ag cocatalysts and M–Cr dual cocatalysts (M = Au, Cu, Pd, and Pt), this change significantly improved the formation rate of CO and selectivity toward CO evolution in the photocatalytic conversion of CO₂ by the electron ...
DOI:
10.1021/acssuschemeng.8b04665

59. Effect of TiO2 polymorph and alcohol sacrificial agent on the activity of Au/TiO2 photocatalysts for H2 production in alcohol–water mixtures

Author:
Wan-Ting Chen; Andrew Chan; Zakiya H.N. Al-Azri; Aubrey G. Dosado; Muhammad A. Nadeem; Dongxiao Sun-Waterhouse; Hicham Idriss; Geoffrey I.N. Waterhouse
Source:
Journal of catalysis 2015 v.329 pp. 499-513
ISSN:
0021-9517
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; ethanol; ethylene; ethylene glycol; glycerol; gold; hydrogen; hydrogen production; methanol; moieties; nanogold; photocatalysis; photocatalysts; surface area; surface plasmon resonance; titanium dioxide; transmission electron microscopy; ultraviolet-visible spectroscopy; urea
Abstract:
... This study compares the performance of 5 different Au/TiO2 photocatalysts for H2 production in alcohol–water mixtures under UV excitation, placing particular emphasis on the role of the TiO2 support and alcohol sacrificial reagent. 1.5wt.% Au/TiO2 photocatalysts were prepared by the deposition–precipitation with urea method, using P25 TiO2 (85% anatase and 15% rutile, 49m²g⁻¹), sol–gel anatase (39 ...
DOI:
10.1016/j.jcat.2015.06.014

60. Effect of gold loading and TiO₂ support composition on the activity of Au/TiO₂ photocatalysts for H₂ production from ethanol–water mixtures

Author:
Vedran Jovic; Wan-Ting Chen; Dongxiao Sun-Waterhouse; Mark G. Blackford; Hicham Idriss; Geoffrey I.N. Waterhouse
Source:
Journal of catalysis 2013 v.305 no. pp. 307-317
ISSN:
0021-9517
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; absorption; crystallites; electron transfer; gold; hydrogen production; nanogold; nanoparticles; photocatalysts; photoluminescence; surface plasmon resonance; titanium dioxide; transmission electron microscopy; ultraviolet radiation
Abstract:
... This paper systematically compares the activity of Au/TiO₂ photocatalysts (Au loadings 0–10wt.%) for H₂ production from ethanol–water mixtures under UV excitation. Degussa P25 TiO₂ was used as the support phase. TEM analyses revealed that the average Au nanoparticle size at all loadings was 5±2nm, with the Au nanoparticles preferentially located at the interfacial sites between TiO₂ crystallites. ...
DOI:
10.1016/j.jcat.2013.05.031

61. Effects of Photodeposited Gold vs Platinum Nanoparticles on N,F-Doped TiO2 Photoactivity: A Time-Resolved Photoluminescence Investigation

Author:
Maria Vittoria Dozzi; Alessia Candeo; Gianluigi Marra; Cosimo D’Andrea; Gianluca Valentini; Elena Selli
Source:
Journal of physical chemistry 2018 v.122 no.26 pp. 14326-14335
ISSN:
1932-7455
Subject:
absorption; electron transfer; fluorine; gold; hydrogen production; nanogold; nanoparticles; nitrogen; photocatalysis; photoluminescence; platinum; synergism; titanium dioxide
Abstract:
... The time-resolved photoluminescence (PL) in the nanosecond time scale of TiO₂ materials undoped or codoped with nitrogen and fluorine (N,F-doping) and modified by noble metals (NM, i.e. Au or Pt) nanoparticles (NPs) photodeposition has been systematically investigated in relation to their photocatalytic activity in hydrogen production. The main aim of the study is to elucidate the origin of the NM ...
DOI:
10.1021/acs.jpcc.8b02997

62. Efficient Hydrogen Generation from Ammonia Borane and Tandem Hydrogenation or Hydrodehalogenation over AuPd Nanoparticles

Author:
Michelle Muzzio; Honghong Lin; Kecheng Wei; Xuefeng Guo; Chao Yu; Typher Yom; Zheng Xi; Zhouyang Yin; Shouheng Sun
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.7 pp. 2814-2821
ISSN:
2168-0485
Subject:
ammonia; catalysts; chemical pollutants; dehydrogenation; gold; hydrogen; hydrogen production; hydrogenation; methanolysis; nanoparticles; nitro compounds; palladium
Abstract:
... Alternatives to the use of pressurized hydrogen (H₂) in chemical syntheses are of growing interest and importance in developing safer protocols. Ammonia borane (AB), with its high hydrogen content and ability to release H₂ under mild conditions, is one potential solution. However, optimization of AB dehydrogenation and further the use of AB as a H₂ source to facilitate tandem one-pot reactions wit ...
DOI:
10.1021/acssuschemeng.9b06862

63. Efficient Subnanometric Gold-Catalyzed Hydrogen Generation via Formic Acid Decomposition under Ambient Conditions

Author:
Bi Qing-Yuan; Du Xian-Long; Liu Yong-Mei; Cao Yong; He He-Yong; Fan Kang-Nian
Source:
Journal of the American Chemical Society 2012 v.134 no.21 pp. 8926-8933
ISSN:
1520-5126
Subject:
acid tolerance; ambient temperature; catalysts; dehydrogenation; formates; formic acid; gold; hydrogen; hydrogen production; renewable energy sources; synthesis
Abstract:
... Formic acid (FA) has tremendous potential as a safe and convenient source of hydrogen for sustainable chemical synthesis and renewable energy storage, but controlled and efficient dehydrogenation of FA by a robust solid catalyst under ambient conditions constitutes a major challenge. Here, we report that a previously unappreciated combination of subnanometric gold and an acid-tolerant oxide suppor ...
DOI:
10.1021/ja301696e

64. Efficient hydrogen evolution from water using CdTe photocathodes under simulated sunlight

Author:
Jin Su; Tsutomu Minegishi; Kazunari Domen
Source:
Journal of materials chemistry A 2017 v.5 no.25 pp. 13154-13160
ISSN:
2050-7496
Subject:
annealing; cadmium chloride; cathodes; copper; electric current; gold; hydrogen; hydrogen production; lighting; platinum; tin dioxide
Abstract:
... CdTe-based photocathodes have shown an extremely high incident photon-to-current conversion efficiency (IPCEs) of >95% at 560–660 nm with an applied potential of 0 VRHE. In the present study, the effects of a back contact and annealing in the presence of CdCl₂ on the PEC properties of CdTe-based photocathodes were investigated. Structural characterization demonstrated that the grain structure of C ...
DOI:
10.1039/c7ta03761a

65. Efficient photoelectrochemical water splitting of nanostructured hematite on a three-dimensional nanoporous metal electrode

Author:
Chang Hong Bak; Kwanghyun Kim; Kyoungok Jung; Jin-Baek Kim; Ji-Hyun Jang
Source:
Journal of materials chemistry A 2014 v.2 no.41 pp. 17249-17252
ISSN:
2050-7496
Subject:
dielectric spectroscopy; electric current; electrochemistry; electrodes; electrons; gold; hematite; hot water treatment; hydrogen production; iron oxyhydroxides; lighting; nanocrystals; nanopores; photocatalysis; silver; solar radiation
Abstract:
... We report great enhancement in photoelectrochemical water splitting efficiency of hematite assisted by fast and easy transfer of electrons/holes via a 3D-nanoporous gold (3D-NG) electrode. 3D-nanostructured α-Fe₂O₃/NG electrodes were fabricated in three subsequent procedures, de-alloying Au/Ag to produce a conductive 3D-NG electrode, decorating nanocrystalline β-FeOOH onto the nanopores of 3D-NG v ...
DOI:
10.1039/c4ta03578j

66. Efficient utilization of photogenerated electrons and holes for photocatalytic redox reactions using visible light-driven Au/ZnIn2S4 hybrid

Author:
Taotao Zhu; Xiangju Ye; Qiaoqiao Zhang; Zhenzhen Hui; Xuchun Wang; Shifu Chen
Source:
Journal of hazardous materials 2019 v.367 pp. 277-285
ISSN:
0304-3894
Subject:
benzaldehyde; benzyl alcohol; carbon dioxide; electrons; gold; hydrogen; hydrogen production; irradiation; nanosheets; nitrogen fixation; oxidation; photocatalysis; photocatalysts; protons
Abstract:
... In this study, a new photocatalytic reaction system for simultaneous selective oxidation of aromatic alcohols to corresponding aldehydes and reduction of protons to H2 has been developed. The results reveal that compared with pure ZnIn2S4, the ZnIn2S4 photocatalysts modified with noble metal gold (Au/ZnIn2S4) significantly promote the photocatalytic performance. Among them, the 0.5% Au/ZnIn2S4 nan ...
DOI:
10.1016/j.jhazmat.2018.12.093

67. Efficiently Enhancing Visible Light Photocatalytic Activity of Faceted TiO2 Nanocrystals by Synergistic Effects of Core–Shell Structured Au@CdS Nanoparticles and Their Selective Deposition

Author:
Tong Ruifeng; Liu Chang; Xu Zhenkai; Kuang Qin; Xie Zhaoxiong; Zheng Lansun
Source:
ACS Applied Materials & Interfaces 2016 v.8 no.33 pp. 21326-21333
ISSN:
1944-8252
Subject:
gold; hydrogen production; irradiation; nanocrystals; nanoparticles; photocatalysis; photocatalysts; semiconductors; titanium dioxide
Abstract:
... Integrating wide bandgap semiconductor photocatalysts with visible-light-active inorganic nanoparticles (such as Au and CdS) as sensitizers is one of the most efficient methods to improve their photocatalytic activity in the visible light region. However, as for all such composite photocatalysts, a rational design and precise control over their architecture is often required to achieve optimal per ...
DOI:
10.1021/acsami.6b05563

68. Electro-catalytically active Au@Pt nanoparticles for hydrogen evolution reaction: an insight into a tryptophan mediated supramolecular interface towards a universal core–shell synthesis approach

Author:
Sarvesh Kumar Srivastava; Jonathan Sabaté del Río; Ciara K. O'Sullivan; Chiaki Ogino; Akihiko Kondo
Source:
RSC advances 2014 v.4 no.89 pp. 48458-48464
ISSN:
2046-2069
Subject:
ambient temperature; catalytic activity; electrochemistry; glassy carbon electrode; gold; hydrogen production; nanoparticles; tryptophan
Abstract:
... We report an eco-friendly, one-pot, room-temperature method for the rapid synthesis of electrocatalytically active Au@Pt (50 nm) bimetallic nanoparticles via a tryptophan (Trp) mediated supramolecular interface in an aqueous environment. Our results demonstrate a simple universal approach for high shell–metal loading where a pre-stabilized tryptophan polymerized-Au core serves as a template to fac ...
DOI:
10.1039/c4ra08365b

69. Electrocatalyst Design for Direct Borohydride Oxidation Guided by First Principles

Author:
Rostamikia Gholamreza; Patel Romesh J.; Merino-Jimenez Irene; Hickner Michael; Janik Michael J.
Source:
The Journal of Physical Chemistry C 2017 v.121 no.5 pp. 2872-2881
ISSN:
1932-7455
Subject:
Gibbs free energy; adsorption; alloys; catalysts; catalytic activity; chemical bonding; copper; dissociation; electrochemistry; electrodes; energy; gold; hydrogen; hydrogen production; oxidation
Abstract:
... Density functional theory (DFT) calculations are used to propose a Au–Cu binary metal catalyst for the electrochemical borohydride oxidation reaction (BOR), which is evaluated experimentally and observed to show enhanced oxidation activity relative to a pure Au electrode. Our previous work has applied DFT methods to determine the BOR mechanism and elucidate the key reaction steps that dictate cata ...
DOI:
10.1021/acs.jpcc.6b12159

70. Electrochemical Activation of CO2 through Atomic Ordering Transformations of AuCu Nanoparticles

Author:
Dohyung Kim; Chenlu Xie; Nigel Becknell; Yi Yu; Mohammadreza Karamad; Karen Chan; Ethan J. Crumlin; Jens K. Nørskov; Peidong Yang
Source:
Journal of the American Chemical Society 2017 v.139 no.24 pp. 8329-8336
ISSN:
1520-5126
Subject:
alloys; carbon dioxide; carbon monoxide; catalysts; catalytic activity; copper nanoparticles; electrochemistry; gold; hydrogen production; nanogold
Abstract:
... Precise control of elemental configurations within multimetallic nanoparticles (NPs) could enable access to functional nanomaterials with significant performance benefits. This can be achieved down to the atomic level by the disorder-to-order transformation of individual NPs. Here, by systematically controlling the ordering degree, we show that the atomic ordering transformation, applied to AuCu N ...
DOI:
10.1021/jacs.7b03516

71. Electrochemical Determination of Low Levels of Uranyl by a Vibrating Gold Microelectrode

Author:
Peled Y.; Krent E.; Tal N.; Tobias H.; Mandler D.
Source:
Analytical chemistry 2015 v.87 no.1 pp. 768-776
ISSN:
1520-6882
Subject:
aqueous solutions; bubbles; detection limit; electrochemistry; electrodes; electrons; gold; hydrogen production; silver; silver chloride; uranium
Abstract:
... In this work we report the sensitive electroanalytical detection of uranium(VI) in aqueous solutions. Uranium commonly exists in aqueous solutions in the form of its oxo ion, uranyl (UⱽᴵO₂²⁺). The detection of uranyl has been accomplished by us through its deposition upon reduction by two electrons to the insoluble UO₂ using a bare disk gold macroelectrode and anodic stripping voltammetry (ASV). T ...
DOI:
10.1021/ac503719r

72. Electrochemical Reduction of CO2 at Functionalized Au Electrodes

Author:
Fang Yuxin; Flake John C.
Source:
Journal of the American Chemical Society 2017 v.139 no.9 pp. 3399-3405
ISSN:
1520-5126
Subject:
batteries; carbon dioxide; carbon monoxide; cysteamine; desorption; electrochemistry; electrodes; electrolytes; foil; formates; fuels; gold; hydrogen; hydrogen production; ligands; methodology; renewable energy sources
Abstract:
... Electrochemical reduction of CO₂ provides an opportunity to store renewable energy as fuels with much greater energy densities than batteries. Product selectivity of the reduction reaction is known to be a function of the electrolyte and electrode; however, electrodes modified with functional ligands may offer new methods to control selectivity. Here, we report the electrochemical reduction of CO₂ ...
DOI:
10.1021/jacs.6b11023

73. Electrogenerated Chemiluminescence with Peroxydisulfate as a Coreactant Using Boron Doped Diamond Electrodes

Author:
Andrea Fiorani; Irkham; Giovanni Valenti; Francesco Paolucci; Yasuaki Einaga
Source:
Analytical chemistry 2018 v.90 no.21 pp. 12959-12963
ISSN:
1520-6882
Subject:
boron; carbon; electrochemiluminescence; electrodes; electrolytes; gold; hydrogen; hydrogen production; pH; platinum; ruthenium
Abstract:
... We report on the use of boron doped diamond electrodes for the electrochemiluminescence (ECL) of the coreactant peroxydisulfate and the luminophore ruthenium(II)-tris(2,2′-bipyridine). Compared to common electrode materials (i.e., Pt, Au, glassy carbon), boron doped diamond has a large overpotential for the evolution of hydrogen in aqueous electrolyte solutions. This intrinsic feature enables redu ...
DOI:
10.1021/acs.analchem.8b03622

74. Electroless Patterned Assembly of Metal Nanoparticles on Hydrogen-Terminated Silicon Surfaces for Applications in Photoelectrocatalysis

Author:
Fabre Bruno; Hennous Leila; Ababou-Girard Soraya; Meriadec Cristelle
Source:
ACS Applied Materials & Interfaces 2013 v.5 no.2 pp. 338-343
ISSN:
1944-8252
Subject:
X-radiation; cathodes; energy-dispersive X-ray analysis; gold; hydrogen; hydrogen production; lighting; nanogold; nanoparticles; platinum; scanning electron microscopy; silicon
Abstract:
... The deposition of gold and platinum nanoparticles (NPs) on hydrogen-terminated Si(100) (Si(100)-H) surfaces has been performed by galvanic displacement using fluoride-free sub-millimolar metallic salt solutions. The scanning electron microscopy (SEM) images showed the formation of oblate hemispherical NPs, with an average diameter of ca. 40 nm and an average height of 20 ± 10 and 10 ± 5 nm for Au ...
DOI:
10.1021/am302226q

75. Electronic Integration and Thin Film Aspects of Au–Pd/rGO/TiO₂ for Improved Solar Hydrogen Generation

Author:
Bijoy Tudu; Naresh Nalajala; Kasala P. Reddy; Pranjal Saikia; Chinnakonda S. Gopinath
Source:
ACS applied materials & interfaces 2019 v.11 no.36 pp. 32869-32878
ISSN:
1944-8252
Subject:
Raman spectroscopy; activated carbon; films (materials); gold; graphene oxide; hot water treatment; hydrogen; hydrogen production; methanol; nanocomposites; nanoparticles; palladium; photocatalysis; photocatalysts; titanium dioxide; India
Abstract:
... In the present work, we have synthesized noble bimetallic nanoparticles (Au–Pd NPs) on a carbon-based support and integrated with titania to obtain Au–Pd/C/TiO₂ and Au–Pd/rGO/TiO₂ nanocomposites using an ecofriendly hydrothermal method. Here, a 1:1 (w/w) Au–Pd bimetallic composition was dispersed on (a) high-surface-area (3000 m² g–¹) activated carbon (Au–Pd/C), prepared from a locally available p ...
DOI:
10.1021/acsami.9b07070

76. Emerging clay-aryl-gold nanohybrids for efficient electrocatalytic proton reduction

Author:
Khouloud Jlassi; Sifani Zavahir; Peter Kasak; Igor Krupa; Ahmed A. Mohamed; Mohamed M. Chehimi
Source:
Energy conversion and management 2018 v.168 pp. 170-177
ISSN:
0196-8904
Subject:
X-ray photoelectron spectroscopy; bentonite; biphenyl; catalysts; clay; diazonium compounds; electrochemistry; energy; fluorine; fossil fuels; gold; hydrogen production; nanogold; nanohybrids; salts; sulfuric acid
Abstract:
... There is an ever growing demand for renewable sources of energy to replace conventional fossil fuels. One of the alternatives is usage of hydrogen production by electrochemical hydrogen evolution reaction (HER). Toward this end, we have successfully prepared a novel, robust electrocatalyst for HER containing Au nanoparticles dispersed on a natural bentonite using a simple one-pot reduction process ...
DOI:
10.1016/j.enconman.2018.04.109

77. Engineering Au/MnO₂ hierarchical nanoarchitectures for ethanol electrochemical valorization

Author:
Lorenzo Bigiani; Teresa Andreu; Chiara Maccato; Ettore Fois; Alberto Gasparotto; Cinzia Sada; Gloria Tabacchi; Dileep Krishnan; Johan Verbeeck; Juan Ramón Morante; Davide Barreca
Source:
Journal of materials chemistry A 2020 v.8 no.33 pp. 16902-16907
ISSN:
2050-7496
Subject:
active sites; catalysts; catalytic activity; electrochemistry; energy conversion; engineering; ethanol; foams; gold; hydrogen production; manganese dioxide; nanogold; nickel; oxidation
Abstract:
... The design of eco-friendly electrocatalysts for ethanol valorization is an open challenge towards sustainable hydrogen production. Herein we present an original fabrication route to effective electrocatalysts for the ethanol oxidation reaction (EOR). In particular, hierarchical MnO₂ nanostructures are grown on high-area nickel foam scaffolds by a plasma-assisted strategy and functionalized with lo ...
DOI:
10.1039/d0ta05972b

78. Engineering the hydrogen evolution reaction of transition metals: effect of Li ions

Author:
Anku Guha; Nisheal M. Kaley; Jagannath Mondal; Tharangattu N. Narayanan
Source:
Journal of materials chemistry A 2020 v.8 no.31 pp. 15795-15808
ISSN:
2050-7496
Subject:
anions; carbon dioxide; catalysts; chemical bonding; chlorides; electrochemistry; energy; gold; hydrogen production; iridium; iron; lithium; nickel; nitrates; nitrogen; pH; palladium; perchlorates; platinum; thermodynamics
Abstract:
... Though the role of supporting ions such as Li ions (Li⁺) in the electrochemical hydrogen evolution reaction (HER) has been extensively studied in the recent past, the fundamental mechanism influencing the HER kinetics of different metals under varied electrolyte conditions is still not known. Here we unveil the mechanism leading to a tunable HER on different metals under varying pH conditions, and ...
DOI:
10.1039/c9ta12926j

79. Enhanced Photocatalytic Hydrogen Production Activities of Au-Loaded ZnS Flowers

Author:
Zhang Jiye; Wang Yonghao; Zhang Jun; Lin Zhang; Huang Feng; Yu Jiaguo
Source:
ACS Applied Materials & Interfaces 2013 v.5 no.3 pp. 1031-1037
ISSN:
1944-8252
Subject:
absorption; gold; hydrogen production; ions; nanogold; photocatalysis; surface plasmon resonance; xenon; zinc sulfide
Abstract:
... Au-nanoparticle-decorated ZnS nanoarchitectures were fabricated by a simple hydrothermal approach combined with a deposition-precipitation method. After the deposition-precipitation process, 5-nm Au nanoparticles were homogeneously dispersed on the ZnS surface. In addition, the band gap of ZnS was also narrowed by the incorporation of a small amount of Au(I) ions. The photocatalytic hydrogen produ ...
DOI:
10.1021/am302726y

80. Enhanced Photoelectrochemical Water Splitting of Photoelectrode Simultaneous Decorated with Cocatalysts Based on Spatial Charge Separation and Transfer

Author:
Zhifeng Liu; Jing Zhang; Weiguo Yan
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.3 pp. 3565-3574
ISSN:
2168-0485
Subject:
absorbance; absorption; electric current; electrons; energy; gold; hydrogen production; iron oxyhydroxides; irradiation; nanogold; nanorods; zinc oxide
Abstract:
... A ZnO/CdS heterojunction photoanode simultaneously decorated with separated Au and FeOOH cocatalysts is first established and applied in efficient photoelectrochemical water splitting. Enhanced optical performance is observed as well as the photocurrent density enhancement of 116% (5.38 mA·cm–² at 1.23 V vs RHE) compared to that of a pure ZnO photoanode which can be ascribed to improved light abso ...
DOI:
10.1021/acssuschemeng.7b03894

81. Enhanced Solar Hydrogen Evolution over In Situ Gold–Platinum Bimetallic Nanoparticle-Loaded Ti3+ Self-Doped Titania Photocatalysts

Author:
Theyyathum Kavil Rahul; Minu Mohan; Neelakandapillai Sandhyarani
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.3 pp. 3049-3059
ISSN:
2168-0485
Subject:
gold; heat treatment; hydrogen production; nanoparticles; opal; photocatalysis; photocatalysts; photons; solar radiation; titanium dioxide
Abstract:
... This work presents a photochemical and thermal treatment strategy to prepare in situ gold–platinum bimetallic nanoparticle-loaded titania photocatalysts with self-doped Ti³⁺ states (Au–Pt/Ti³⁺ nc-TiO₂). In situ loading of Au–Pt bimetallic nanoparticles and Ti³⁺ self-doping in the TiO₂ crystal lattice result in excellent solar light photocatalytic activity. The Au–Pt/Ti³⁺ nc-TiO₂ displays an improv ...
DOI:
10.1021/acssuschemeng.7b02898

82. Enhanced Visual Wireless Electrochemiluminescence Immunosensing of Prostate-Specific Antigen Based on the Luminol Loaded into MIL-53(Fe)-NH₂ Accelerator and Hydrogen Evolution Reaction Mediation

Author:
Seyyed Mehdi Khoshfetrat; Hosein Khoshsafar; Abbas Afkhami; Masoud A. Mehrgardi; Hasan Bagheri
Source:
Analytical chemistry 2019 v.91 no.9 pp. 6383-6390
ISSN:
1520-6882
Subject:
antibodies; cameras; cathodes; copper; copper nanoparticles; detection limit; electrochemiluminescence; electrochemistry; foams; gold; graphene; hydrogen peroxide; hydrogen production; iron; magnetism; nanosheets; prostate-specific antigen; ruthenium
Abstract:
... A sensitive prostate-specific antigen (PSA) detection method using a visual-readout closed bipolar electrode (BPE) system has been introduced by integration of hydrogen evolution reaction (HER) in cathodic pole and electrochemiluminescence (ECL) of luminol loaded within the MIL-53(Fe)-NH₂ (L@MIL-53(Fe)-NH₂) in the anodic pole. The cathode of the BPE was electrochemically synthesized by 3D porous c ...
DOI:
10.1021/acs.analchem.9b01506

83. Enhanced electrocatalytic hydrogen evolution on a plasmonic electrode: the importance of the Ti/TiO₂ adhesion layer

Author:
Liuqing Pang; Alexandre Barras; Vladyslav Mishyn; Georgiana Sandu; Sorin Melinte; Palaniappan Subramanian; Rabah Boukherroub; Sabine Szunerits
Source:
Journal of materials chemistry A 2020 v.8 no.28 pp. 13980-13986
ISSN:
2050-7496
Subject:
activation energy; adhesion; catalysts; catalytic activity; dissociation; electrochemistry; electrodes; electromagnetic field; electrons; energy; gold; hydrogen; hydrogen production; irradiation; lighting; nanogold; platinum; titanium dioxide
Abstract:
... The electrochemical production of hydrogen is enjoying renewed vigor due to its great promise as an environmentally friendly energy alternative. Herein, we demonstrate the capacity of nanoperforated gold films deposited on flexible substrates coated with nanometer thick Ti/TiO₂ adhesion layers for electrochemical water splitting under light irradiation. The strong plasmonic induced electromagnetic ...
DOI:
10.1039/d0ta02353a

84. Enhanced hydrogen evolution efficiency achieved by atomically controlled platinum deposited on gold nanodendrites with high-index surfaces

Author:
Ying-Huang Lai; Sin-Ren Li; Swathi M. G; Hsiao-Tzu Chang; Yu-Bin Huang; Yen-Ken Li; Yu-Mei Chen; Shivaraj B. Patil; Shu-Yi Chang; Po-Kai Chen; Chia-Che Chang; Yi-Chia Chen; Chih-Wen Pao; Jeng-Lung Chen; Chuan-Yu Wei; I.-Kuan Lin; Hung-Lung Chou; Chun-Jen Su; U-Ser Jeng; Tsung-Rong Kuo; Cheng-Yen Wen; Di-Yan Wang
Source:
Journal of materials chemistry A 2021 v.9 no.40 pp. 22901-22912
ISSN:
2050-7496
Subject:
atomic absorption spectrometry; carbon; carbon fibers; catalysts; catalytic activity; desorption; electrolytes; gold; hydrogen production; paper; platinum; reaction mechanisms
Abstract:
... There have been several studies on the catalytic activity of the hydrogen evolution reaction (HER) using ultralow loading of Pt catalysts or even Pt single atom catalysts. However, Pt single atom deposited on the surface of the carbon or metal oxide material has some drawbacks, such as high possibility of Pt desorption from the supported material in the electrolyte. Besides, from the reaction mech ...
DOI:
10.1039/d1ta07066e

85. Enhanced hydrogen production from ammonia borane using controlled plasmonic performance of Au nanoparticles deposited on TiO₂

Author:
Seongwon Jo; Priyanka Verma; Yasutaka Kuwahara; Kohsuke Mori; Wonyong Choi; Hiromi Yamashita
Source:
Journal of materials chemistry A 2017 v.5 no.41 pp. 21883-21892
ISSN:
2050-7496
Subject:
ammonia; chromium; electron transfer; electrons; gold; hydrogen; hydrogen production; irradiation; nanogold; photocatalysis; photocatalysts; photoluminescence; surface plasmon resonance; titanium dioxide; ultraviolet radiation
Abstract:
... Ammonia borane (AB) is a hydrogen storage material which can produce three equivalent moles of H₂ gas by a hydrolytic decomposition reaction in the presence of an appropriate catalyst. The photocatalytic H₂ generation from AB decomposition was studied by utilizing the Au/TiO₂ plasmonic photocatalyst under both visible and UV light conditions. Different amounts of gold (0.5, 1, 2, and 3%) were phot ...
DOI:
10.1039/c7ta07264c

86. Enhanced photocatalytic hydrogen evolution along with byproducts suppressing over Z-scheme CdxZn1−xS/Au/g-C3N4 photocatalysts under visible light

Author:
He Zhao; Xiaoling Ding; Bing Zhang; Yingxuan Li; Chuanyi Wang
Source:
Science bulletin 2017 pp. -
ISSN:
2095-9273
Subject:
byproducts; carbon dioxide; carbon monoxide; carbon nitride; gluconic acid; glucose; gold; hydrogen production; hydroxyl radicals; irradiation; photocatalysis; photocatalysts; photoluminescence; photosynthesis
Abstract:
... Inspired by natural photosynthesis, a new series of Z-scheme CdxZn1−xS/Au/g-C3N4 photocatalysts were synthesized via depositing Au particles on g-C3N4, followed by anchoring CdxZn1−xS solid solution on the pre-formed Au/g-C3N4 for photocatalytic hydrogen evolution. Their structure, morphology and optical property were investigated in detail. Photocatalytic activities of the developed photocatalyst ...
DOI:
10.1016/j.scib.2017.03.005

87. Enhancing Photocatalytic Activity of Au-Capped CdS–PbS Heterooctahedrons by Morphology Control

Author:
Kai Chen; Si-Jing Ding; Song Ma; Wei Wang; Shan Liang; Li Zhou; Qu-Quan Wang
Source:
Journal of physical chemistry 2020 v.124 no.14 pp. 7938-7945
ISSN:
1932-7455
Subject:
cadmium sulfide; gold; hydrogen production; magnetism; nanogold; photocatalysis
Abstract:
... We report the preparation of Au-capped CdS–PbS heterooctahedrons of Au@CdS–PbS with controlled morphology for enhanced photocatalytic H₂ generation. Au@CdS–PbS heteronanostructures possess three advantages: (1) CdS–PbS octahedrons form a p-n heterojunction with built-in field for efficient separation of photoexcited charge carriers. (2) Au nanocups exhibit strong light-harvesting capability in bro ...
DOI:
10.1021/acs.jpcc.0c00349

88. Ethanol Decomposition on Pd–Au Alloy Catalysts

Author:
Hao Li; Edward J. Evans; C. Buddie Mullins; Graeme Henkelman
Source:
Journal of physical chemistry 2018 v.122 no.38 pp. 22024-22032
ISSN:
1932-7455
Subject:
activation energy; alloys; carbon; carbon monoxide; catalysts; chemical bonding; cleavage (chemistry); density functional theory; desorption; ethanol; gold; hydrogen; hydrogen production; infrared spectroscopy; methane; methane production; models; palladium; steam
Abstract:
... The mechanisms of ethanol (EtOH) decomposition via C–C or C–O bond cleavage on alloy surfaces are currently not well understood. In this study, we model EtOH decomposition on close-packed Pd–Au catalytic surfaces using density functional theory (DFT) calculations and derived Brønsted–Evans–Polanyi (BEP) relationships. Three characteristic Pd–Au surfaces are considered, Pd₁Au₂(111), Pd₂Au₁(111), an ...
DOI:
10.1021/acs.jpcc.8b08150

89. Exceptional Size-Dependent Activity Enhancement in the Electroreduction of CO2 over Au Nanoparticles

Author:
Mistry Hemma; Reske Rulle; Zeng Zhenhua; Zhao Zhi-Jian; Greeley Jeffrey; Strasser Peter; Cuenya Beatriz Roldan
Source:
Journal of the American Chemical Society 2014 v.136 no.47 pp. 16473-16476
ISSN:
1520-5126
Subject:
carbon cycle; carbon dioxide; carbon monoxide; catalysts; catalytic activity; chemical reduction; electrodes; energy efficiency; gold; hydrogen; hydrogen production; nanogold; potassium bicarbonate; processing technology
Abstract:
... The electrocatalytic reduction of CO₂ to industrial chemicals and fuels is a promising pathway to sustainable electrical energy storage and to an artificial carbon cycle, but it is currently hindered by the low energy efficiency and low activity displayed by traditional electrode materials. We report here the size-dependent catalytic activity of micelle-synthesized Au nanoparticles (NPs) in the si ...
DOI:
10.1021/ja508879j

90. Exceptional size-dependent catalytic activity enhancement in the room-temperature hydrogen generation from formic acid over bimetallic nanoparticles supported by porous carbon

Author:
Jia Cheng; Xiaojun Gu; Xueli Sheng; Penglong Liu; Haiquan Su
Source:
Journal of materials chemistry A 2016 v.4 no.5 pp. 1887-1894
ISSN:
2050-7496
Subject:
alloy nanoparticles; alloys; ambient temperature; carbon; carbon monoxide; catalysts; catalytic activity; coordination compounds; dehydrogenation; formic acid; glutamic acid; gold; hydrogen; hydrogen production; isoelectric point; lysine; metal ions; palladium; serine; sodium borohydride; ultraviolet-visible spectroscopy
Abstract:
... In this work, we report a prominent size-dependent activity in the catalytic dehydrogenation of formic acid (HCOOH, FA) over carbon-supported AuPd alloy nanoparticles (NPs) directed by amino acids (lysine, serine and glutamic acid) with different isoelectric points. Through decreasing the average size of AuPd NPs from 12.8 ± 0.5 to 3.8 ± 0.5 nm using different amino acids as structure-directing ag ...
DOI:
10.1039/c5ta08534a

91. Fabrication of Glass-Insulated Ultramicrometer to Submicrometer Carbon Fiber Electrodes to Support a Single Nanoparticle and Nanoparticle Ensembles in Electrocatalytic Investigations

Author:
César A. Ortiz-Ledón; Cynthia G. Zoski
Source:
Analytical chemistry 2018 v.90 no.21 pp. 12616-12624
ISSN:
1520-6882
Subject:
atomic force microscopy; carbon; carbon fibers; electrochemistry; electrodes; epoxides; geometry; gold; hardness; hydrogen production; nanoparticles; platinum; polymers; resins; surface roughness
Abstract:
... We report a procedure to fabricate glass-insulated carbon fiber ultramicroelectrodes (CF UMEs) with sizes of 10 and 1 μm in diameter. CF UMEs of theses sizes are commonly insulated with polymer or epoxy resins, which typically have pinholes and are less stable and difficult to polish. Through judicious choice of polishing materials, the fabrication procedure reported here leads to CF UMEs with a s ...
DOI:
10.1021/acs.analchem.8b02785

92. Fabrication of Hollow Mesoporous CdS@TiO₂@Au Microspheres with High Photocatalytic Activity for Hydrogen Evolution from Water under Visible Light

Author:
Wei Yuan; Zhen Zhang; Xiaoling Cui; Huarong Liu; Chen Tai; Yuanrui Song
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.11 pp. 13766-13777
ISSN:
2168-0485
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; coatings; direct contact; gamma radiation; gold; hydrogen; hydrogen production; lighting; mass transfer; microparticles; nanogold; nitrogen; oxygen; photocatalysis; photocatalysts; porous media; titanium dioxide; transmission electron microscopy
Abstract:
... Hollow mesoporous CdS@TiO₂@Au microspheres as a photocatalyst have been successfully synthesized by γ-irradiation deposition of Au nanoparticles (NPs) on the double shell of hollow CdS@TiO₂ microspheres, which are prepared via the “hard core template” approach combining with calcination and solvothermal reaction. The morphology, structure, and properties of the as-prepared hybrid photocatalyst hav ...
DOI:
10.1021/acssuschemeng.8b01787

93. Fabrication of g-C₃N₄/Au/CdZnS Z-scheme photocatalyst to enhance photocatalysis performance

Author:
Xiumin Ma; Quantong Jiang; Weimin Guo; Meng Zheng; Weichen Xu; Fubin Ma; Baorong Hou
Source:
RSC advances 2016 v.6 no.34 pp. 28263-28269
ISSN:
2046-2069
Subject:
carbon nitride; electrochemistry; electron transfer; electrons; gold; hydrogen; hydrogen production; nanogold; oxidation; photocatalysis; photocatalysts; photoluminescence
Abstract:
... In this study, a sandwich-structured C₃N₄/Au/CdZnS photocatalyst with Au nanoparticles sandwiched between C₃N₄ and CdZnS was fabricated. The results showed that there was a 6.3 mmol g⁻¹ increase of hydrogen production for C₃N₄/Au/CdZnS photocatalyst compared to C₃N₄/CdZnS in 4 h. The photoinduced I–t curve, electrochemical impedance spectrum (EIS), photogenerated electron lifetime and photolumines ...
DOI:
10.1039/c5ra27429j

94. Fabrication of sandwich-structured g-C3N4/Au/BiOCl Z-scheme photocatalyst with enhanced photocatalytic performance under visible light irradiation

Author:
Shuo Zhao; Yiwei Zhang; Yuming Zhou; Jiasheng Fang; Yanyun Wang; Chao Zhang; Wenxia Chen
Source:
Journal of materials science 2018 v.53 no.8 pp. 6008-6020
ISSN:
0022-2461
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; absorption; carbon nitride; chlorides; energy-dispersive X-ray analysis; free radicals; gold; hydrogen production; ionic liquids; irradiation; photocatalysis; photocatalysts; reflectance spectroscopy; scanning electron microscopes; tetracycline; transmission electron microscopy
Abstract:
... A novel sandwich-structured g-C₃N₄/Au/BiOCl Z-scheme heterojunction with enhanced visible-light-driven photocatalytic activity was successfully fabricated using the reactable ionic liquid (1-methyl-3-[3’-(trimethoxysilyl) propyl] imidazolium chloride) as the template by a facile photoreduction followed by in situ deposition. The samples were characterized by X-ray diffraction, X-ray photoelectron ...
DOI:
10.1007/s10853-018-1995-z

95. Facile control of surface crystallographic orientation of anodized nanoporous gold catalyst and its application for highly efficient hydrogen evolution reaction

Author:
Yasuhiro Mie; Haruka Takayama; Yu Hirano
Source:
Journal of catalysis 2020 v.389 pp. 476-482
ISSN:
0021-9517
Subject:
catalysts; catalytic activity; electrochemistry; electrodes; gold; hydrochloric acid; hydrogen production; nanogold; nanopores
Abstract:
... Controlling the surface crystallographic orientation in a nanostructured catalyst is expected to be effective in improving its catalytic performance. Herein, a simple one-step method for producing an anodized nanoporous gold (NPG) electrode with a controlled contribution of atomic surface orientations is reported. Anodization of a conventional Au electrode in 35 and 500 mM HCl solutions produced n ...
DOI:
10.1016/j.jcat.2020.06.023

96. Facile synthesis of AgAuPd/graphene with high performance for hydrogen generation from formic acid

Author:
Si-jia Li; Yun Ping; Jun-Min Yan; Hong-Li Wang; Ming Wu; Qing Jiang
Source:
Journal of materials chemistry A 2015 v.3 no.28 pp. 14535-14538
ISSN:
2050-7496
Subject:
ambient temperature; catalytic activity; crystal structure; formic acid; gold; graphene; hydrogen; hydrogen production; nanoparticles; palladium; particle size; silver
Abstract:
... AgAuPd nanoparticles with small particle size, good dispersity and high degree of crystallinity on graphene are synthesized by a facile co-reduction route. The resultant AgAuPd/graphene exhibits 100% H₂ selectivity, 100% conversion and excellent catalytic activity toward the hydrogen generation from decomposition of formic acid without any additive at room temperature. ...
DOI:
10.1039/c5ta03111g

97. Facile synthesis of amine-functionalized SBA-15-supported bimetallic Au–Pd nanoparticles as an efficient catalyst for hydrogen generation from formic acid

Author:
Lixin Xu; Fang Yao; Jili Luo; Chao Wan; Mingfu Ye; Ping Cui; Yue An
Source:
RSC advances 2017 v.7 no.8 pp. 4746-4752
ISSN:
2046-2069
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; catalysts; catalytic activity; dehydrogenation; formates; formic acid; gold; hydrogen; hydrogen production; nanoparticles; palladium; transmission electron microscopy
Abstract:
... In this study, a series of amine-functionalized SBA-15-supported bimetallic Au–Pd nanoparticles (Au–Pd/SBA-15-Amine) as catalysts are successfully synthesized by surface functionalization and co-reduction and characterized by inductively coupled plasma-atomic emission spectroscopy, XRD, XPS, and TEM. The Au–Pd/SBA-15-Amine catalysts thus obtained are tested for the dehydrogenation of formic acid ( ...
DOI:
10.1039/c6ra26793a

98. Facile synthesis of graphitic carbon nitride/chitosan/Au nanocomposite: A catalyst for electrochemical hydrogen evolution

Author:
Atefeh Nasri; Babak Jaleh; Sadegh Khazalpour; Mahmoud Nasrollahzadeh; Mohammadreza Shokouhimehr
Source:
International journal of biological macromolecules 2020 v.164 pp. 3012-3024
ISSN:
0141-8130
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; biopolymers; carbon nitride; catalysts; catalytic activity; chitosan; electrochemistry; energy-dispersive X-ray analysis; gold; graphene; hydrogen; hydrogen production; liquids; nanocomposites; pyrolysis; stainless steel; transmission electron microscopy; urea; voltammetry
Abstract:
... This paper reports a novel nanocomposite catalyst comprised of graphitic carbon nitride (g-C₃N₄), chitosan and gold (Au) nanoparticles, which has been prepared through a facile, clean and low cost method. Graphitic carbon nitride has been fabricated by pyrolysis of urea. Laser ablation in liquid (LAL) was employed in the green synthesis of Au NPs. The g-C₃N₄/chitosan/Au nanocomposite (denoted as C ...
DOI:
10.1016/j.ijbiomac.2020.08.143

99. Facilitating hole transfer on electrochemically synthesized p-type CuAlO₂ films for efficient solar hydrogen production from water

Author:
Seung Yo Choi; Chang-Duk Kim; Dong Suk Han; Hyunwoong Park
Source:
Journal of materials chemistry A 2017 v.5 no.21 pp. 10165-10172
ISSN:
2050-7496
Subject:
air; aluminum; annealing; copper; crystal structure; dimethyl sulfoxide; electric current; electrochemistry; electrodes; gold; hydrogen production; lighting; photoluminescence; potassium hydroxide; solar radiation; solvents; sulfites; tin dioxide
Abstract:
... Delafossite CuAlO₂ photoelectrodes are synthesized via the electrodeposition of Cu(ii) and Al(iii) onto fluorine-doped tin oxide (FTO) substrates in water and dimethylsulfoxide (DMSO) solvents, followed by annealing in air and Ar. The surface properties, crystalline structure, and photoelectrochemical (PEC) performance of the as-synthesized samples are significantly affected by the synthetic condi ...
DOI:
10.1039/c7ta01919j

100. Factors Influencing Catalytic Activity of Size-Specific Triphenylphosphine-Ligated Gold Nanoclusters in the Electrocatalytic Hydrogen Evolution Reaction

Author:
Hanieh Mousavi; Yanting Yin; Shailendra Kumar Sharma; Christopher T. Gibson; Vladimir Golovko; Gunther G. Andersson; Cameron J. Shearer; Gregory F. Metha
Source:
Journal of physical chemistry 2021 v.126 no.1 pp. 246-260
ISSN:
1932-7455
Subject:
X-ray photoelectron spectroscopy; absorbance; atomic absorption spectrometry; catalysts; catalytic activity; clean energy; gold; graphene oxide; hydrogen production; ligands; light; nanocomposites; nanogold; physical chemistry; sulfuric acid; thermogravimetry; transmission electron microscopy
Abstract:
... Hydrogen production via electrocatalytic water splitting has attracted growing attention as an alternative renewable and clean energy source. Size-specific gold nanoclusters and complexes (AuNCs) can serve as models for investigating the catalytic behavior toward the hydrogen evolution reaction (HER) at the atomic level. This work is focused on exploring the factors influencing the catalytic activ ...
DOI:
10.1021/acs.jpcc.1c08924