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1. (00l)-Facet-Exposed Planelike ABi2Nb2O9 (A = Ca, Sr, Ba) Powders with a Single-Crystal Grain for Enhancement of Photocatalytic Activity

Author:
Yifeng Zhang; Jing Yuan; Huihua Gong; Yue Cao; Kewei Liu; Hongmei Cao; Hongjian Yan; Jianguo Zhu
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.3 pp. 3840-3852
ISSN:
2168-0485
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; geometry; hydrogen production; irradiation; nanoparticles; oxidation; oxygen production; photocatalysis; photocatalysts; photoluminescence; platinum; powders; reflectance spectroscopy; scanning electron microscopy; slabs; temperature; transmission electron microscopy
Abstract:
... (00l)-facet-exposed planelike ABi₂Nb₂O₉ (A = Ca, Sr, Ba) powders with a single-crystal grain were obtained successfully by the molten salt method. The planelike grains were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, diffuse reflectance spectroscopy, photoluminescence spectroscopy, and X-ray photoelectron spectroscopy. With modification by pl ...
DOI:
10.1021/acssuschemeng.7b04181

2. (0D/3D) MoS2 on porous graphene as catalysts for enhanced electrochemical hydrogen evolution

Author:
Yizhe Liu; Yuanzhi Zhu; Xiaobin Fan; Shaobin Wang; Yang Li; Fengbao Zhang; Guoliang Zhang; Wenchao Peng
Source:
Carbon 2017 v.121 pp. 163-169
ISSN:
0008-6223
Subject:
active sites; carbon dioxide; catalysts; composite materials; electrochemistry; graphene; graphene oxide; hydrogen production; nanoflowers; surface area
Abstract:
... A new composite material consisting of 0D MoS2 nanodots and 3D MoS2 nano-flowers grown on porous reduced graphene oxide (P-rGO) was synthesized via a two-step process. The P-rGO with a surface area of 759 m2 g−1 was obtained by CO2 activation of reduced graphene oxide (rGO) at 800 °C. MoS2 was then grown on the P-rGO under hydrothermal conditions. Compared to the nonactivated rGO, P-rGO has functi ...
DOI:
10.1016/j.carbon.2017.05.092

3. (B,N)-Doped 3D porous graphene–CNTs synthesized by chemical vapor deposition as a bi-functional catalyst for ORR and HER

Author:
Pingping Gao; Min Sun; Xiaobo Wu; Shuzhu Zhou; Xiaoting Deng; Zhiyong Xie; Li Xiao; Lihui Jiang; Qizhong Huang
Source:
RSC advances 2018 v.8 no.47 pp. 26934-26937
ISSN:
2046-2069
Subject:
acid tolerance; catalysts; density functional theory; electrochemistry; energy; hydrogen production; nanotubes; vapors
Abstract:
... Novel (B,N)-doped three-dimensional (3D) porous graphene–carbon nanotubes (CNTs) can be used as an excellent alkaline and acid tolerant electrocatalyst for both the oxygen reduction reaction (ORR) and the hydrogen evolution reaction (HER). Based on density functional theory, the H and O atoms’ pre-and post-adsorption energy can effectively reduce the reaction energy barrier. ...
DOI:
10.1039/c8ra04048f

4. 0.2 V Electrolysis Voltage-Driven Alkaline Hydrogen Production with Nitrogen-Doped Carbon Nanobowl-Supported Ultrafine Rh Nanoparticles of 1.4 nm

Author:
Nan Jia; Yanping Liu; Lei Wang; Pei Chen; Xinbing Chen; Zhongwei An; Yu Chen
Source:
ACS applied materials & interfaces 2019 v.11 no.38 pp. 35039-35049
ISSN:
1944-8252
Subject:
Gibbs free energy; adsorption; carbon; catalysts; chemical bonding; density functional theory; electrolysis; energy conservation; hydrazine; hydrogen; hydrogen production; nanoparticles; oxidation; potassium hydroxide; rhodium
Abstract:
... The development of highly effective and low-cost electrocatalysts for energy-saving hydrogen production via water splitting is still a great challenge. Herein, porous nitrogen-doped carbon nanobowls (N-CBs) have been designed and used for the controlled growth of ultrafine rhodium (Rh) nanoparticles. With the aid of interfacial bonding of Rh and N, ultrafine Rh nanoparticles with an average size o ...
DOI:
10.1021/acsami.9b13586

5. 0D/2D NiS2/V-MXene composite for electrocatalytic H2 evolution

Author:
Panyong Kuang; Min He; Bicheng Zhu; Jiaguo Yu; Ke Fan; Mietek Jaroniec
Source:
Journal of catalysis 2019 v.375 pp. 8-20
ISSN:
0021-9517
Subject:
X-ray photoelectron spectroscopy; active sites; catalysts; electrochemistry; electrolysis; electron transfer; hydrogen; hydrogen production; nanoparticles; titanium; vanadium
Abstract:
... As a member of the family of so-called MXenes, two-dimensional vanadium carbide (V2CTx, denoted as V-MXene) used in electrocatalytic hydrogen evolution reaction (HER) is still in the stage of theoretical study without significant experimental exploration. Here, we present the theoretical and experimental studies on the intrinsic structural and electrochemical properties of V-MXene-based hybrid (Ni ...
DOI:
10.1016/j.jcat.2019.05.019

6. 0D/2D heterojunctions of molybdenum carbide-tungsten carbide quantum dots/N-doped graphene nanosheets as superior and durable electrocatalysts for hydrogen evolution reaction

Author:
Lili Huo; Baocang Liu; Zhiqing Gao; Jun Zhang
Source:
Journal of materials chemistry A 2017 v.5 no.35 pp. 18494-18501
ISSN:
2050-7496
Subject:
catalysts; durability; electrochemistry; electrons; graphene; hydrogen production; molybdenum; nanocomposites; nanocrystals; nanohybrids; nanosheets; pH; quantum dots
Abstract:
... It is of great importance to exploit and design efficient and low-cost alternatives to platinum-based electrocatalysts for the hydrogen evolution reaction (HER). In this work, we report novel well-defined 0D/2D heterojunctions of uniform molybdenum carbide-tungsten carbide quantum dots ((Mo₂C)ₓ–(WC)₁₋ₓ–QDs, ∼3–5 nm)/N-doped graphene (NG) nanosheets with a two-dimensional layered structure obtained ...
DOI:
10.1039/c7ta02864d

7. 1,3,5-Triazine and dibenzo[b,d]thiophene sulfone based conjugated porous polymers for highly efficient photocatalytic hydrogen evolution

Author:
Jinlong Wang; Guangcheng Ouyang; Yang Wang; Xiaolan Qiao; Wei-Shi Li; Hongxiang Li
Source:
Chemical communications 2020 v.56 no.10 pp. 1601-1604
ISSN:
1364-548X
Subject:
hydrogen production; photocatalysis; photocatalysts; polymers; prototypes; thiophene
Abstract:
... Organic conjugated porous polymers, triazine-Ph-CPP and triazine-Th-CPP, are synthesized and characterized. Without further addition of co-catalysts, triazine-Ph-CPP exhibits a HER of 16 287 μmol g⁻¹ h⁻¹ and an apparent quantum yield of 61.5% at 365 nm, which demonstrates that the dibenzo[b,d]thiophene sulfone and 1,3,5-triazine based polymer is a unique prototype of a highly efficient hydrogen ev ...
DOI:
10.1039/c9cc08412f

8. 1,3-Propanediol production and tolerance of a halophilic fermentative bacterium, Halanaerobium saccharolyticum subsp. saccharolyticum

Author:
Anniina Kivistö; Ville Santala; Matti Karp
Source:
Journal of biotechnology 2012 v.158 no.4 pp. 242-247
ISSN:
0168-1656
Subject:
Halanaerobium saccharolyticum; absorbance; acetates; bacteria; biotechnology; glycerol; growth retardation; hydrogen production; industry; polyesters; polyurethanes; temperature; vitamin B12
Abstract:
... 1,3-Propanediol (1,3-PD) is widely used in polymer industry in production of polyethers, polyesters and polyurethanes. In this article, a study on 1,3-PD production and tolerance of Halanaerobium saccharolyticum subsp. saccharolyticum is presented. 1,3-PD production was optimized for temperature, vitamin B₁₂ and acetate concentration. The highest 1,3-PD concentrations and yields (0.6mol/mol gl ...
DOI:
10.1016/j.jbiotec.2011.10.013

9. 100% saturated liquid hydrogen production: Mixed-refrigerant cascaded process with two-stage ortho-to-para hydrogen conversion

Author:
Muhammad Abdul Qyyum; Amjad Riaz; Ahmad Naquash; Junaid Haider; Kinza Qadeer; Alam Nawaz; Hyunhee Lee; Moonyong Lee
Source:
Energy conversion and management 2021 v.246 pp. 114659
ISSN:
0196-8904
Subject:
administrative management; carbon dioxide; climate change; cost effectiveness; economic sustainability; energy efficiency; exergy; hydrogen; hydrogen production; liquefaction; liquids; refrigeration; specific energy; storage time; transportation
Abstract:
... To reduce CO₂ emissions and address climate change concerns, most futuristic studies investigating 100% renewable energy sources and subsequent power-to-gas/fuel/liquid/X technological developments have been based on hydrogen (H₂). The long-term storage and transportation of H₂ over long distances restrict its feasibility as an energy vector, mainly due to its low energy density. Liquefaction is a ...
DOI:
10.1016/j.enconman.2021.114659

10. 110th Anniversary: A Total Water Splitting Electrocatalyst Based on Borate/Fe Co-Doping of Nickel Sulfide

Author:
Zhao Zhang; Tianran Zhang; Jim Yang Lee
Source:
Industrial & engineering chemistry process design and development 2019 v.58 no.29 pp. 13053-13063
ISSN:
1520-5045
Subject:
borates; catalysts; electrochemistry; electrodes; foams; hydrogen; hydrogen production; microparticles; nickel; oxygen production; platinum; process design; sulfides
Abstract:
... The design of tunable low-cost electrocatalysts efficient in both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) is central to the clean production of hydrogen without the reliance on platinum group metals (PGMs), which are the best known electrocatalysts for these reactions today. In this study, a catalyst-integrated electrode with a tunable composition (borate/Fe d ...
DOI:
10.1021/acs.iecr.9b01976

11. 1D metal-dithiolene wires as a new class of bi-functional oxygen reduction and evolution single-atom electrocatalysts

Author:
Qingming Deng; Jin Han; Jiong Zhao; Guibin Chen; Tejs Vegge; Heine Anton Hansen
Source:
Journal of catalysis 2021 v.393 pp. 140-148
ISSN:
0021-9517
Subject:
Gibbs free energy; adsorption; batteries; catalysts; catalytic activity; density functional theory; design; electrochemistry; evolution; exhibitions; fuel cells; hydrogen production; oxygen; oxygen production; platinum; reaction mechanisms; surfaces; wire
Abstract:
... Discovering low-cost, durable and highly active electrocatalysts with reduced use of precious platinum group metals (PGM) as catalysts for the hydrogen evolution reaction (HER), the oxygen reduction reaction (ORR), and the oxygen evolution reaction (OER) is a key step for large-scale adaptation of fuel cells, electrolyzers, and metal-air batteries. Here we explore the stability and reaction mechan ...
DOI:
10.1016/j.jcat.2020.11.016

12. 1D nanofiber composites of perylene diimides for visible-light-driven hydrogen evolution from water

Author:
Shuai Chen; Daniel L. Jacobs; Jingkun Xu; Yingxuan Li; Chuanyi Wang; Ling Zang
Source:
RSC advances 2014 v.4 no.89 pp. 48486-48491
ISSN:
2046-2069
Subject:
aqueous solutions; catalysts; hydrogen production; irradiation; light; methanol; moieties; nanocomposites; nanofibers; photocatalysis; semiconductors; titanium dioxide
Abstract:
... A series of novel nanocomposite structures have been fabricated by in situ deposition of TiO₂ layers and/or a co-catalyst (Pt) on one-dimensional (1D) self-assembled nanofibers of perylene diimide derivatives (PDIs). The PDI molecules were functionalized with dodecyl and/or phenylamino groups to compare the effect of nanofiber morphology and intramolecular charge transfer on the photocatalytic per ...
DOI:
10.1039/c4ra09258a

13. 1T-2H Crₓ-MoS₂ Ultrathin Nanosheets for Durable and Enhanced Hydrogen Evolution Reaction

Author:
Juan Jian; He Li; Xuejiao Sun; Dechen Kong; Xinghui Zhang; Le Zhang; Hongming Yuan; Shouhua Feng
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.7 pp. 7227-7232
ISSN:
2168-0485
Subject:
active sites; chromium; electron transfer; hydrogen production; molybdenum disulfide; nanosheets; surface area
Abstract:
... MoS₂-based materials for hydrogen evolution reaction (HER) were widely reported in recent years. However, the poor conductivity limited the application of MoS₂. In this paper, we introduced the heteroatom Cr³⁺ into the MoS₂ with different weight percent. The property for HER was largely enhanced, especially for the Cr₀.₀₆-MoS₂. The overpotential of Cr₀.₀₆-MoS₂ (0.20 V) was much lower than that of ...
DOI:
10.1021/acssuschemeng.9b00229

14. 1T/1T′-dominated WSe₂ with stabilized oxygen dopants for efficient and durable hydrogen evolution

Author:
Zhuxing Sun; Yiwen Wang; Junyu Lang; Mengfei Yang; Fangming Jin; Yun Hang Hu
Source:
Journal of materials chemistry A 2021 v.9 no.23 pp. 13490-13495
ISSN:
2050-7496
Subject:
durability; hydrogen production; oxidation; oxygen
Abstract:
... For the first time, the importance of the oxidized W species in WSe₂ catalysts for HER is revealed. Meanwhile, via a specifically designed yet facile solvothermal strategy, a 1T/1T′ dominated hybrid-phase WSe₂ with stabilized oxygen species was obtained, realizing outstanding activity and durability for HER. ...
DOI:
10.1039/d1ta01370j

15. 1T/2H Mixed Phase MoS₂ Nanosheets Integrated by a 3D Nitrogen-Doped Graphene Derivative for Enhanced Electrocatalytic Hydrogen Evolution

Author:
Xiaobei Zang; Yijiang Qin; Teng Wang; Fashun Li; Qingguo Shao; Ning Cao
Source:
ACS applied materials & interfaces 2020 v.12 no.50 pp. 55884-55893
ISSN:
1944-8252
Subject:
catalysts; catalytic activity; graphene; graphene oxide; hydrogen production; hydrophilicity; molybdenum disulfide; nanosheets; phase transition; thermodynamics; urea
Abstract:
... Molybdenum disulfide (MoS₂) has become one of the most promising non-platinum-based electrocatalysts for the hydrogen evolution reaction (HER) because of its unique layered structure. However, the catalytic performance of the thermodynamically stable MoS₂ is hindered by its poor conductivity and scarce active sites. We developed a 3D porous N-doped graphene derivative-integrated metal–semiconducto ...
DOI:
10.1021/acsami.0c16537

16. 2-Acrylamido-2-methyl-1-propanesulfonic Acid Grafted Poly(vinylidene fluoride-co-hexafluoropropylene)-Based Acid-/Oxidative-Resistant Cation Exchange for Membrane Electrolysis

Author:
Pandey Ravi P.; Das Arindam K.; Shahi Vinod K.
Source:
ACS applied materials 2015 v.7 no.51 pp. 28524-28533
ISSN:
1944-8252
Subject:
bound water; cation exchange; composite polymers; electrolysis; energy; hydrogen; ion-exchange membranes; water uptake
Abstract:
... For developing acid-/oxidative-resistant aliphatic-polymer-based cation-exchange membrane (CEM), macromolecular modification of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP) was carried out by controlled chemical grafting of 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS). To introduce the unsaturation suitable for chemical grafting, dehydrofluorination of commercially availab ...
DOI:
10.1021/acsami.5b09827

17. 2-Pyridinide as an Active Catalytic Intermediate for CO2 Reduction on p-GaP Photoelectrodes: Lifetime and Selectivity

Author:
Shenzhen Xu; Emily A. Carter
Source:
Journal of the American Chemical Society 2018 v.140 no.28 pp. 8732-8738
ISSN:
1520-5126
Subject:
activation energy; carbon dioxide; formates; hydrides; hydrogen; hydrogen production; pyridines
Abstract:
... The active intermediate responsible for pyridine (Py)-catalyzed reduction of CO₂ on a p-GaP photoelectrode is currently under debate. Exploration of the proposed intermediates’ available pathways for further reaction may yield a deeper understanding of the CO₂ reduction mechanism that will be essential to designing better cocatalysts in such photoelectrochemical systems. Adsorbed 2-pyridinide (2-P ...
DOI:
10.1021/jacs.8b03774

18. 250 kWth high pressure pilot demonstration of the syngas chemical looping system for high purity H2 production with CO2 capture

Author:
Tien-Lin Hsieh; Dikai Xu; Yitao Zhang; Sourabh Nadgouda; Dawei Wang; Cheng Chung; Yaswanth Pottimurthy; Mengqing Guo; Yu-Yen Chen; Mingyuan Xu; Pengfei He; Liang-Shih Fan; Andrew Tong
Source:
Applied energy 2018 v.230 pp. 1660-1672
ISSN:
0306-2619
Subject:
carbon; carbon dioxide; combustion; fossil fuels; heat; hydrogen; hydrogen production; measuring devices; models; oxidants; oxygen; synthesis gas
Abstract:
... Chemical looping combustion (CLC) is an advanced technology for converting fossil fuel while achieving in-situ CO₂ capture. The high purity CO generated in the combustion product stream is sequestration/utilization ready, which makes chemical looping one of the most attractive carbon emission control technology. In this paper, the authors present the design, simulation and experimental operation r ...
DOI:
10.1016/j.apenergy.2018.09.104

19. 2D BiVO4/g-C3N4 Z-scheme photocatalyst for enhanced overall water splitting

Author:
Hanyi Xie; Yanfang Zhao; Huijuan Li; Yizhen Xu; Xiangfeng Chen
Source:
Journal of materials science 2019 v.54 no.15 pp. 10836-10845
ISSN:
0022-2461
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; electron paramagnetic resonance spectroscopy; graphene; hydrogen production; irradiation; optical properties; oxygen production; pH; photocatalysis; photocatalysts; photoluminescence; scanning electron microscopes; semiconductors; transmission electron microscopes; ultraviolet-visible spectroscopy
Abstract:
... A 2D Z-scheme BiVO₄/g-C₃N₄ photocatalyst was successfully synthesized by a two-step hydrothermal/calcination method for overall water splitting. Morphology design to restrain the growth of BiVO₄ nanoplates with thickness around 20 nm was achieved by adjusting the pH value and introducing graphene sheets. Then, the BiVO₄/g-C₃N₄ (BVO-CN) hybrid photocatalysts were fabricated with different mass rati ...
DOI:
10.1007/s10853-019-03664-9

20. 2D Cocrystallized Metal–Organic Nanosheet Array as an Efficient and Stable Bifunctional Electrocatalyst for Overall Water Splitting

Author:
Wen Ye; Yongsheng Yang; Xiaoyu Fang; Muhammad Arif; Xuebo Chen; Dongpeng Yan
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.21 pp. 18085-18092
ISSN:
2168-0485
Subject:
active sites; catalysts; cobalt; electrochemistry; energy; energy use and consumption; foams; fossil fuels; hydrogen; hydrogen production; nanosheets; nickel; oxygen production; synergism
Abstract:
... Electrochemical water splitting to produce hydrogen can meet growing energy needs while balancing the impact of severe fossil fuel consumption. To date, it is still greatly desirable to obtain bifunctional and precious metal-free electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) simultaneously during overall water splitting toward actual applications. H ...
DOI:
10.1021/acssuschemeng.9b05126

21. 2D Layered g-C₃N₄/WO₃/WS₂ S-Scheme Heterojunctions with Enhanced Photochemical Performance

Author:
Tong Song; Cong Xie; Katarzyna Matras-Postolek; Ping Yang
Source:
Journal of physical chemistry 2021 v.125 no.35 pp. 19382-19393
ISSN:
1932-7455
Subject:
carbon nitride; electron transfer; energy; graphene; hydrogen production; light; nanosheets; oxygen; photocatalysis; photocatalysts; physical chemistry
Abstract:
... Graphitic carbon nitride (g-C₃N₄)/WO₃/WS₂ ternary heterojunctions were fabricated for the first time via in situ growing WO₃ and WS₂ on superior thin g-C₃N₄ nanosheets. A mechanic chemical prereaction plays an important role in the formation of S-scheme heterojunctions. Namely, the heterostructured photocatalyst prepared by optimized preparation conditions revealed enhanced photodegrading activity ...
DOI:
10.1021/acs.jpcc.1c06753

22. 2D Single Crystal WSe₂ and MoSe₂ Nanomeshes with Quantifiable High Exposure of Layer Edges from 3D Mesoporous Silica Template

Author:
Weiming Xu; Kejie Chai; Yi-wen Jiang; Jianbin Mao; Jun Wang; Pengfei Zhang; Yifeng Shi
Source:
ACS applied materials & interfaces 2019 v.11 no.19 pp. 17670-17677
ISSN:
1944-8252
Subject:
catalytic activity; crystal structure; electrochemistry; hydrogen production; nanomaterials; porous media; silica; synergism
Abstract:
... The design and fabrication of layered transition metal chalcogenides with high exposure of crystal layer edges is one of the key paths to achieve distinctive performances in their catalysis and electrochemistry applications. Two-dimensional WSe₂ and MoSe₂ nanomeshes with orderly arranged nanoholes were synthesized by using a mesoporous silica material KIT-6 with three-dimensional mesoporous struct ...
DOI:
10.1021/acsami.9b03435

23. 2D heat and mass transfer modeling of methane steam reforming for hydrogen production in a compact reformer

Author:
Meng Ni
Source:
Energy conversion and management 2013 v.65 no. pp. 155-163
ISSN:
0196-8904
Subject:
catalysts; combustion; fuels; heat transfer; hydrogen production; mass transfer; mathematical models; methane; methane production; permeability; reaction kinetics; steam; temperature
Abstract:
... Compact reformers (CRs) are promising devices for efficient fuel processing. In CRs, a thin solid plate is sandwiched between two catalyst layers to enable efficient heat transfer from combustion duct to the reforming duct for fuel processing. In this study, a 2D heat and mass transfer model is developed to investigate the fundamental transport phenomenon and chemical reaction kinetics in a CR for ...
DOI:
10.1016/j.enconman.2012.07.017

24. 2D metal–organic-framework array-derived hierarchical network architecture of cobalt oxide flakes with tunable oxygen vacancies towards efficient oxygen evolution reaction

Author:
Yuanjian Li; Huanwen Wang; Yuzhu Li; Qiang Wang; Debao Li; Rui Wang; Beibei He; Yansheng Gong
Source:
Journal of catalysis 2018 v.364 pp. 48-56
ISSN:
0021-9517
Subject:
activation energy; catalysts; catalytic activity; cobalt; cobalt oxide; coordination polymers; density functional theory; electric power; electrical conductivity; electrodes; foams; hydrogen production; hydrogenation; nickel; oxygen; oxygen production
Abstract:
... The development of highly active dual-functional electrocatalysts, especially for oxygen evolution reaction (OER), is highly desirable to electrocatalyze water splitting for hydrogen production. Herein, a cobalt metal-organic frameworks (Co-MOFs) array is employed as the platform to fabricate oxygen-defect-rich Co₃O₄ flakes that are vertical grown on nickel foam substrates. This MOFs-derived Co₃O₄ ...
DOI:
10.1016/j.jcat.2018.05.006

25. 2D-structured V-doped Ni(Co,Fe) phosphides with enhanced charge transfer and reactive sites for highly efficient overall water splitting electrocatalysts

Author:
Yongjae Jeung; Hyeonjung Jung; Dokyoung Kim; Hyogyun Roh; Chaeeun Lim; Jeong Woo Han; Kijung Yong
Source:
Journal of materials chemistry A 2021 v.9 no.20 pp. 12203-12213
ISSN:
2050-7496
Subject:
alloys; catalysts; catalytic activity; density functional theory; dissociation; electrical conductivity; hydrogen production; oxygen production; phosphides
Abstract:
... 2-D Ni alloy phosphide catalysts are of great interest due to their strong bond strength to reaction intermediates and numerous active sites for alkaline overall water splitting (OWS) reactions. However, the limitations of hydrogen evolution reaction (HER) activity and electrical conductivity significantly lower the OWS activity compared to noble metal catalysts. To overcome this problem, V-doping ...
DOI:
10.1039/d1ta02149d

26. 2D/1D Zn0.7Cd0.3S p-n heterogeneous junction enhanced with NiWO4 for efficient photocatalytic hydrogen evolution

Author:
Yang Liu; Guorong Wang; Yanbing Li; Zhiliang Jin
Source:
Journal of colloid and interface science 2019 v.554 pp. 113-124
ISSN:
0021-9797
Subject:
active sites; electric field; hydrogen production; photocatalysis; scanning electron microscopy; solid solutions; surface area; thermodynamics; transmission electron microscopy
Abstract:
... Bimetallic solid solutions have attracted much attention in the field of photocatalysis due to their excellent photocatalytic properties. Here, Zn0.7Cd0.3S solid solution with two morphologies was prepared by typical solvent-thermal method. The co-existence of 1D rod-like Zn0.7Cd0.3S and 2D sheet-like Zn0.7Cd0.3S can be found in SEM and TEM diagrams. This special structure can provide a larger spe ...
DOI:
10.1016/j.jcis.2019.06.080

27. 2D/2D Heterostructured CdS/WS2 with Efficient Charge Separation Improving H2 Evolution under Visible Light Irradiation

Author:
Ke Zhang; Mamoru Fujitsuka; Yukou Du; Tetsuro Majima
Source:
ACS applied materials & interfaces 2018 v.10 no.24 pp. 20458-20466
ISSN:
1944-8252
Subject:
electrons; energy; hydrogen; hydrogen production; irradiation; nanosheets; photocatalysts; reflectance spectroscopy
Abstract:
... Efficient water splitting for H₂ evolution under visible light irradiation has attracted more attention for solving the global environmental and energy issues, but it is still a major challenge to develop an earth-abundant and efficient photocatalyst. Herein, we report two-dimensional (2D)/2D heterostructured CdS/WS₂ (CdS/WS₂), composed of nanosheet CdS (CdS) and nanosheet WS₂ (WS₂), as an efficie ...
DOI:
10.1021/acsami.8b04080

28. 2D/3D S-scheme heterojunction of carbon nitride/iodine-deficient bismuth oxyiodide for photocatalytic hydrogen production and bisphenol A degradation

Author:
Feihu Mu; Benlin Dai; Yahui Wu; Gang Yang; Shijie Li; Lili Zhang; Jiming Xu; Yazi Liu; Wei Zhao
Source:
Journal of colloid and interface science 2022 v.612 pp. 722-736
ISSN:
0021-9797
Subject:
bismuth; bisphenol A; carbon; electric field; hydrogen production; light; nanosheets; oxidation; photocatalysis
Abstract:
... A novel 2D/3D S-scheme carbon nitride/iodine-deficient bismuth oxyiodide (g-C₃N₄/BiO₁.₂I₀.₆) heterojunction was constructed for the first time by calcining a mixture of g-C₃N₄ nanosheets and flower-like BiOI. Irradiated by visible light, this g-C₃N₄/BiO₁.₂I₀.₆ heterojunction exhibited excellent photocatalytic hydrogen production and BPA degradation activity with high cycle stability. In particular ...
DOI:
10.1016/j.jcis.2021.12.196

29. 2D–2D Heterostructured UNiMOF/g-C₃N₄ for Enhanced Photocatalytic H₂ Production under Visible-Light Irradiation

Author:
Aihui Cao; Lijuan Zhang; Yun Wang; Huijun Zhao; Hong Deng; Xueming Liu; Zhang Lin; Xintai Su; Fan Yue
Source:
ACS sustainable chemistry & engineering 2018 v.7 no.2 pp. 2492-2499
ISSN:
2168-0485
Subject:
carbon nitride; catalysts; coordination polymers; hydrogen production; irradiation; nickel; photocatalysis
Abstract:
... On the basis of ultrathin two-dimensional (2D) nickel metal organic framework (UNiMOF) nanoflakes and 2D g-C₃N₄ nanoflakes, fresh visible-light-driven 2D/2D heterostructure catalysts were designed, which were assembled with a simplistic electrostatic self-assembly process. The photocatalytic performance of UNiMOF/g-C₃N₄ for H₂ production was evaluated in visible light. The hydrogen evolution of 25 ...
DOI:
10.1021/acssuschemeng.8b05396

30. 2D–2D SnS₂/Covalent Organic Framework Heterojunction Photocatalysts for Highly Enhanced Solar-Driven Hydrogen Evolution without Cocatalysts

Author:
Dandan Shang; Di Li; Biyi Chen; Bifu Luo; Yuanyong Huang; Weidong Shi
Source:
ACS sustainable chemistry & engineering 2021 v.9 no.42 pp. 14238-14248
ISSN:
2168-0485
Subject:
absorption; green chemistry; hydrogen; hydrogen production; light; photocatalysis; photocatalysts; solar energy
Abstract:
... Covalent organic frameworks (COFs) are a category of promising materials in the field of solar-driven hydrogen (H₂) evolution, but their applications are limited by the speedy recombination of photoinduced charge carriers and the absorption of marginal visible light. Herein, a 2D–2D SnS₂/TpPa-1-COF heterojunction photocatalyst was prepared via a one-step hydrothermal route to relieve the abovement ...
DOI:
10.1021/acssuschemeng.1c05162

31. 2H and 2H/1T-Transition Metal Dichalcogenide Films Prepared via Powderless Gas Deposition for the Hydrogen Evolution Reaction

Author:
Michelle P. Browne; Filip Novotný; C. Lorena Manzanares Palenzuela; Jiří Šturala; Zdenek Sofer; Martin Pumera
Source:
ACS sustainable chemistry & engineering 2019 v.7 no.19 pp. 16440-16449
ISSN:
2168-0485
Subject:
catalysts; catalytic activity; clean energy; electricity; electrochemistry; electrodes; energy; fuel cells; hydrogen; hydrogen production; molybdenum disulfide; platinum
Abstract:
... The cathodic process in electrochemical water electrolyzers, the hydrogen evolution reaction (HER), is an extremely important reaction as it produces clean H₂ gas that can be utilized in a fuel cell to create electricity as an energy source for the increasing energy consumption of today’s World. Transition metal dichalcogenide (TMD) materials have emerged as a competitor to Pt catalysts for the HE ...
DOI:
10.1021/acssuschemeng.9b03637

32. 2H → 1T Phase Change in Direct Synthesis of WS2 Nanosheets via Solution-Based Electrochemical Exfoliation and Their Catalytic Properties

Author:
Leong Shi Xuan; Mayorga-Martinez Carmen C.; Chia Xinyi; Luxa Jan; Sofer Zdeněk; Pumera Martin
Source:
ACS Applied Materials & Interfaces 2017 v.9 no.31 pp. 26350-26356
ISSN:
1944-8252
Subject:
active sites; electrochemistry; electrodes; energy; hydrogen production; methodology; nanosheets; oxygen; phase transition
Abstract:
... Metallic 1T-WS₂ has various interesting properties such as increased density of catalytically active sites on both the basal planes and edges as well as metallic conductivity which allows it to be used in applications such as biosensing and energy devices. Hence, it is highly beneficial to develop a simple, efficient, and low-cost synthesis method of 1T-WS₂ nanosheets from commercially available b ...
DOI:
10.1021/acsami.7b06898

33. 2H → 1T phase transition and hydrogen evolution activity of MoS₂, MoSe₂, WS₂ and WSe₂ strongly depends on the MX₂ composition

Author:
Adriano Ambrosi; Zdeněk Sofer; Martin Pumera
Source:
Chemical communications 2015 v.51 no.40 pp. 8450-8453
ISSN:
1364-548X
Subject:
chemical reactions; hydrogen production; molybdenum disulfide; phase transition; selenides
Abstract:
... We investigate herein the four most widely considered TMD materials: MoS₂, MoSe₂, WS₂ and WSe₂. A 2H → 1T phase transition occurs during the chemical exfoliation with different efficiencies among the four materials. ...
DOI:
10.1039/c5cc00803d

34. 3-Nitrooxypropanol decreases methane emissions and increases hydrogen emissions of early lactation dairy cows, with associated changes in nutrient digestibility and energy metabolism

Author:
Sanne van Gastelen; Jan Dijkstra; Gisabeth Binnendijk; Stéphane M. Duval; Jeroen M.L. Heck; Maik Kindermann; Tamme Zandstra; André Bannink
Source:
Journal of dairy science 2020 v.103 no.9 pp. 8074-8093
ISSN:
0022-0302
Subject:
Holstein; body weight changes; calving; climate; corn silage; dairy cows; diet; digestibility; dry matter intake; early lactation; energy intake; energy metabolism; feed conversion; gas exchange; grass silage; greenhouse gas emissions; hydrogen; hydrogen production; metabolizable energy; methane; methane production; milk; milk composition; milk yield; neutral detergent fiber; nutrient intake; nutrients; organic matter; parity (reproduction); placebos
Abstract:
... The aim of this study was to determine the methane (CH₄) mitigation potential of 3-nitrooxypropanol and the persistency of its effect when fed to dairy cows in early lactation. Sixteen Holstein-Friesian cows (all multiparous; 11 cows in their second parity and 5 cows in their third parity) were blocked in pairs, based on actual calving date, parity, and previous lactation milk yield, and randomly ...
DOI:
10.3168/jds.2019-17936

35. 3D CVD graphene oxide-coated Ni foam as carbo- and electro-catalyst towards hydrogen evolution reaction in acidic solution: In situ electrochemical gas chromatography

Author:
Sangchai Sarawutanukul; Nutthaphon Phattharasupakun; Montree Sawangphruk
Source:
Carbon 2019 v.151 pp. 109-119
ISSN:
0008-6223
Subject:
catalysts; catalytic activity; corrosion; electrochemistry; electrodes; electrolytes; foams; gas chromatography; graphene; graphene oxide; hydrogen production; methanol; microscopy; moieties; nickel; spectroscopy; sulfuric acid; vapors
Abstract:
... 3D graphene oxide (GO) carbocatalyst-coated nickel foam substrate (GO@Ni) was synthesized by chemical vapor deposition (CVD) using methanol and water as material precursors. Interestingly, the GO@Ni has anti-corrosion property in an acidic electrolyte and high catalytic activity towards hydrogen evolution reaction (HER). Ni metal is easily corroded in the acid solution and cannot be used as an ele ...
DOI:
10.1016/j.carbon.2019.05.058

36. 3D Coral-Like Ni₃S₂ on Ni Foam as a Bifunctional Electrocatalyst for Overall Water Splitting

Author:
Jianfang Zhang; Yang Li; Tianyu Zhu; Yan Wang; Jiewu Cui; Jingjie Wu; Hui Xu; Xia Shu; Yongqiang Qin; Hongmei Zheng; Pulickel M. Ajayan; Yong Zhang; Yucheng Wu
Source:
ACS applied materials & interfaces 2018 v.10 no.37 pp. 31330-31339
ISSN:
1944-8252
Subject:
aqueous solutions; ions; hydrogen production; electrodes; durability; electrochemistry; thiourea; foams; nickel; oxidation; oxygen production
Abstract:
... High-performance noble metal-free electrocatalysts are extremely desired for overall water splitting, but there are huge challenges. Herein, we report a novel one-step electrochemical anodic oxidation and cathodic deposition strategy to in situ fabricate three-dimensional coral-like Ni₃S₂ on Ni foam (NF) for electrocatalytic overall water splitting. In a typical two-electrode cell, NF acts as both ...
DOI:
10.1021/acsami.8b09361

37. 3D Hydrangea Macrophylla-like Nickel–Vanadium Metal–Organic Frameworks Formed by Self-Assembly of Ultrathin 2D Nanosheets for Overall Water Splitting

Author:
Junjun Lv; Panpan Liu; Fei Yang; Liwen Xing; Danni Wang; Xiao Chen; Hongyi Gao; Xiubing Huang; Yunfeng Lu; Ge Wang
Source:
ACS applied materials & interfaces 2020 v.12 no.43 pp. 48495-48510
ISSN:
1944-8252
Subject:
Hydrangea; adsorption; catalytic activity; durability; energy; foams; hydrogen production; nanoflowers; nanosheets; nickel; oxygen production; reaction kinetics; stoichiometry; vanadium
Abstract:
... The development of highly efficient and low-cost bifunctional noble metal-free electrocatalysts for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is an effective strategy for improving efficiency. Herein, novel three-dimensional (3D) bimetallic metal–organic frameworks containing Ni and V with adjustable stoichiometry were synthesized on nickel foam successfully. N ...
DOI:
10.1021/acsami.0c11722

38. 3D Porous Cobalt–Iron–Phosphorus Bifunctional Electrocatalyst for the Oxygen and Hydrogen Evolution Reactions

Author:
HyoWon Kim; SeKwon Oh; EunAe Cho; HyukSang Kwon
Source:
ACS sustainable chemistry & engineering 2018 v.6 no.5 pp. 6305-6311
ISSN:
2168-0485
Subject:
catalysts; cobalt; electrochemistry; electrodes; foams; hydrogen production; iron; microstructure; oxygen; oxygen production; surface area
Abstract:
... A 3D porous Co–Fe–P foam fabricated using electrodeposition is presented as a high-performance and durable catalyst for both oxygen and hydrogen evolution reactions. To establish optimal Fe/Co ratio of the catalyst, Co–Fe–P films were electrodeposited with Fe/Co ratio of 0.2, 0.4, 1.1, and 3.3. Among the prepared samples, the Co–Fe–P film with the Fe/Co ratio of 1.1 (Co–Fe–P-1.1) exhibited the hig ...
DOI:
10.1021/acssuschemeng.8b00118

39. 3D Printed Graphene Electrodes’ Electrochemical Activation

Author:
Michelle P. Browne; Filip Novotný; Zdeněk Sofer; Martin Pumera
Source:
ACS applied materials & interfaces 2018 v.10 no.46 pp. 40294-40301
ISSN:
1944-8252
Subject:
catalysts; electrochemistry; electrodes; energy; graphene; hydrogen production; iron; manufacturing; melting; oxides; polymers; printers; solvents
Abstract:
... Three-dimensional (3D) printing technologies are emerging as an important tool for the manufacturing of electrodes for various electrochemistry applications. It has been previously shown that metal 3D electrodes, modified with metal oxides, are excellent catalysts for various electrochemical energy and sensing applications. However, the metal 3D printing process, also known as selective laser melt ...
DOI:
10.1021/acsami.8b14701

40. 3D Printed Nickel–Molybdenum-Based Electrocatalysts for Hydrogen Evolution at Low Overpotentials in a Flow-Through Configuration

Author:
Ian Sullivan; Huanlei Zhang; Cheng Zhu; Marissa Wood; Art J. Nelson; Sarah E. Baker; Christopher M. Spadaccini; Tony Van Buuren; Meng Lin; Eric B. Duoss; Siwei Liang; Chengxiang Xiang
Source:
ACS applied materials & interfaces 2021 v.13 no.17 pp. 20260-20268
ISSN:
1944-8252
Subject:
aerogels; carbon; catalysts; chemical composition; electric potential difference; electrochemistry; electrodes; hydrogen; hydrogen production; mass transfer; models; molybdenum; nickel; roughness; surface area; three-dimensional printing
Abstract:
... Three-dimensional (3D) printed, hierarchically porous nickel molybdenum (NiMo) electrocatalysts were synthesized and evaluated in a flow-through configuration for the hydrogen evolution reaction (HER) in 1.0 M KOH(aq) in a simple electrochemical H-cell. 3D NiMo electrodes possess hierarchically porous structures because of the resol-based aerogel precursor, which generates superporous carbon aerog ...
DOI:
10.1021/acsami.1c05648

41. 3D core–shell porous-structured Cu@Sn hybrid electrodes with unprecedented selective CO₂-into-formate electroreduction achieving 100%

Author:
Xiaofan Hou; Yixiao Cai; Dan Zhang; Lv Li; Xia Zhang; Zidi Zhu; Luwei Peng; Yuyu Liu; Jinli Qiao
Source:
Journal of materials chemistry A 2019 v.7 no.7 pp. 3197-3205
ISSN:
2050-7496
Subject:
carbon dioxide; catalysts; copper; electrochemistry; electrodes; electrolysis; equations; formates; fuels; hydrogen; hydrogen production; mass transfer; potassium bicarbonate; renewable energy sources; surface area; tin
Abstract:
... Cu-based catalysts are exceptionally advantageous for the electrochemical CO₂ reduction reaction (CO₂RR) to fuels and chemical products utilizing clean and renewable energy. However, most tend to yield a diversity of hydrocarbon products along with the H₂ evolution side reaction. We reveal how a 3D core–shell porous-structured Cu@Sn hybrid electrode can lead to an unprecedented selective CO₂ elect ...
DOI:
10.1039/c8ta10650a

42. 3D flexible hydrogen evolution electrodes with Se-promoted molybdenum sulfide nanosheet arrays

Author:
Zonghua Pu; Shiyong Wei; Zhibao Chen; Shichun Mu
Source:
RSC advances 2016 v.6 no.14 pp. 11077-11080
ISSN:
2046-2069
Subject:
carbon; catalysts; cathodes; energy conversion; hydrogen production; molybdenum; nanosheets; renewable energy sources
Abstract:
... Developing high-efficiency and stable catalysts from earth-abundant elements for the hydrogen evolution reaction (HER) is essential for renewable energy conversion. In this work, Se-promoted molybdenum sulfide nanosheet arrays supported on flexible carbon cloth (Se–MoS₂/CC) have been successfully synthesized and explored for the first time as a 3D hydrogen evolution cathode. Without any active pro ...
DOI:
10.1039/c5ra28078h

43. 3D hierarchical CuO/Co₃O₄ core–shell nanowire array on copper foam for on-demand hydrogen generation from alkaline NaBH₄ solution

Author:
Lisi Xie; Kunyang Wang; Gu Du; Abdullah M. Asiri; Xuping Sun
Source:
RSC advances 2016 v.6 no.91 pp. 88846-88850
ISSN:
2046-2069
Subject:
activation energy; catalysts; copper; copper nanoparticles; dehydrogenation; durability; foams; hydrogen production; nanowires; sodium borohydride
Abstract:
... In this work, we demonstrate the first use of a 3D hierarchical CuO/Co₃O₄ core–shell nanowire array in situ grown on copper foam as a robust and highly active catalyst toward the hydrolytic dehydrogenation of NaBH₄ for on-demand hydrogen generation in alkaline solutions. This monolithic catalyst exhibits a maximum hydrogen generation rate of 6162.55 mL min⁻¹ g₍CᵤO/Cₒ₃O₄₎⁻¹ under ambient conditions ...
DOI:
10.1039/c6ra17340c

44. 3D hierarchical V–Ni-based nitride heterostructure as a highly efficient pH-universal electrocatalyst for the hydrogen evolution reaction

Author:
Xue Dong; Haijing Yan; Yanqing Jiao; Dezheng Guo; Aiping Wu; Ganceng Yang; Xia Shi; Chungui Tian; Honggang Fu
Source:
Journal of materials chemistry A 2019 v.7 no.26 pp. 15823-15830
ISSN:
2050-7496
Subject:
carbon; catalysts; catalytic activity; electrochemistry; electrolytes; engineering; hydrogen production; mass transfer; metals; nanomaterials; nitrides; pH; potassium hydroxide; renewable energy sources; sulfuric acid
Abstract:
... Exploring inexpensive and efficient electrocatalysts for the hydrogen evolution reaction (HER) in a wide pH range is crucial for the development of sustainable energy applications. Herein, a novel 3D hierarchical V–Ni-based nitride heterojunction on carbon cloth (VN@Ni₃N–Ni/CC) was designed and fabricated as a promising pH-universal HER electrocatalyst through the controllable nitridation of the c ...
DOI:
10.1039/c9ta04742e

45. 3D nanoporous Ni/V₂O₃ hybrid nanoplate assemblies for highly efficient electrochemical hydrogen evolution

Author:
Mei Ming; Yuling Ma; Yun Zhang; Lin-Bo Huang; Lu Zhao; Yu-Yun Chen; Xing Zhang; Guangyin Fan; Jin-Song Hu
Source:
Journal of materials chemistry A 2018 v.6 no.43 pp. 21452-21457
ISSN:
2050-7496
Subject:
active sites; annealing; catalysts; catalytic activity; durability; electrical properties; electrochemistry; hydrogen production; mass transfer; nanopores; nickel; structure-activity relationships; vanadium
Abstract:
... Nickel-based non-noble-metal materials have emerged as promising catalysts for electrochemical hydrogen production in view of their attractive intrinsic activities, electrical properties and low cost. Exploring new candidates for further improving the performances of nickel-based catalysts and understanding the structure–activity relationship are still necessary to reduce the overpotential of the ...
DOI:
10.1039/c8ta07701k

46. 3D ordered macroporous copper nitride–titanium oxynitride as highly efficient electrocatalysts for universal-pH hydrogen evolution reaction

Author:
Yuchen Wu; Fanghua Ning; Zhiwei Wang; Ali Saad; Xiuting Li; Dingguo Xia
Source:
Journal of materials chemistry A 2021 v.9 no.25 pp. 14392-14399
ISSN:
2050-7496
Subject:
active sites; ammonia; clean energy; copper; electrolytes; electron transfer; energy; hydrogen; hydrogen production; porous media; titanium
Abstract:
... The demand for hydrogen for future clean energy has increased research interest in developing non-noble high-efficiency electrocatalysts for the hydrogen evolution reaction (HER). In this study, we prepared a copper nitride-loaded 3D ordered macroporous titanium oxynitride (Cu₃N@3DOM-TiOₓNy) via PS-metal sol–gel and ammonia annealing method. The present Cu₃N@3DOM-TiOₓNy as an electrocatalyst demon ...
DOI:
10.1039/d1ta02457d

47. 3D porous nanostructured platinum prepared using atomic layer deposition

Author:
Sreeprasanth Pulinthanathu Sree; J. Dendooven; L. Geerts; R. K. Ramachandran; E. Javon; F. Ceyssens; E. Breynaert; C. E. A. Kirschhock; R. Puers; T. Altantzis; G. Van Tendeloo; S. Bals; C. Detavernier; J. A. Martens
Source:
Journal of materials chemistry A 2017 v.5 no.36 pp. 19007-19016
ISSN:
2050-7496
Subject:
catalysts; electrochemistry; electrodes; electrolysis; hydrofluoric acid; hydrogen production; nanomaterials; platinum; porous media; silica; tomography; transmission electron microscopy
Abstract:
... A robust and easy to handle 3D porous platinum structure was created via replicating the 3D channel system of an ordered mesoporous silica material using atomic layer deposition (ALD) over micrometer distances. After ALD of Pt in the silica material, the host template was digested using hydrogen fluoride (HF). A fully connected ordered Pt nanostructure was obtained with morphology and sizes corres ...
DOI:
10.1039/c7ta03257a

48. 3D reticulated carbon nitride materials high-uniformly capture 0D black phosphorus as 3D/0D composites for stable and efficient photocatalytic hydrogen evolution

Author:
Ting Song; Gongchang Zeng; Piyong Zhang; Tingting Wang; Atif Ali; Shaobin Huang; Heping Zeng
Source:
Journal of materials chemistry A 2019 v.7 no.2 pp. 503-512
ISSN:
2050-7496
Subject:
active sites; aqueous solutions; carbon nitride; hydrogen production; manufacturing; phosphorus; photocatalysis; quantum dots; redox reactions; semiconductors
Abstract:
... Black phosphorus has recently emerged as an excellent 2D semiconductor with high charge-carrier mobility and wide tunable bandgap for photocatalysis. In this research, a simple method was developed to manufacture reticulated carbon nitride materials (CN-4N). Utilizing the self-capturing property of CN-4N to capture black phosphorus quantum dots (BQ) uniformly dispersed in aqueous solution, BQ were ...
DOI:
10.1039/c8ta09647c

49. 3D self-supported Ni nanoparticle@N-doped carbon nanotubes anchored on NiMoN pillars for the hydrogen evolution reaction with high activity and anti-oxidation ability

Author:
Yi Gong; Linan Wang; Hailang Xiong; Mingfei Shao; Lidong Xu; Ao Xie; Shuxian Zhuang; Yang Tang; Xiaojin Yang; Yongmei Chen; Pingyu Wan
Source:
Journal of materials chemistry A 2019 v.7 no.22 pp. 13671-13678
ISSN:
2050-7496
Subject:
Gibbs free energy; adsorption; carbon; carbon nanotubes; catalytic activity; durability; electrical conductivity; electrodes; electron transfer; energy conversion; foams; hydrogen; hydrogen production; nickel; oxidation; potassium hydroxide; solar energy; sulfuric acid; surface area; synergism; wind power
Abstract:
... A 3D self-supported hierarchical architecture composed of Ni nanoparticle@nitrogen-doped carbon nanotube modified NiMoN micro-pillar arrays grown on Ni foam (Ni@NCNT/NiMoN/NF) was synthesized. Benefiting from the protection by N-doped carbon layers, and the well-designed hierarchical structure with a large surface area, high electrical conductivity and convenient mass/electron transfer paths, this ...
DOI:
10.1039/c9ta03473k

50. 3D self-supported porous vanadium-doped nickel nitride nanosheet arrays as efficient bifunctional electrocatalysts for urea electrolysis

Author:
Rui-Qing Li; Qi Liu; Yanan Zhou; Mengjie Lu; Jinle Hou; Konggang Qu; Yachao Zhu; Olivier Fontaine
Source:
Journal of materials chemistry A 2021 v.9 no.7 pp. 4159-4166
ISSN:
2050-7496
Subject:
Gibbs free energy; adsorption; anodes; cathodes; electrolysis; energy conservation; foams; hydrogen; hydrogen production; nanosheets; nickel; nitrides; oxidation; oxygen production; urea; wastewater treatment
Abstract:
... Electrocatalytic water splitting is an up-and-coming method to produce H₂, but it is mostly limited by the sluggish anodic oxygen evolution reaction (OER). Replacing the OER with the urea oxidation reaction (UOR) process with a low thermodynamic potential would significantly reduce energy consumption. Here we developed porous V-doped Ni₃N nanosheets arrays grown on nickel foam (labeled V–Ni₃N/NF) ...
DOI:
10.1039/d0ta09473k