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1. C–P bond formation of cyclophanyl-, and aryl halides via a UV-induced photo Arbuzov reaction: a versatile portal to phosphonate-grafted scaffolds

Author:
Simon Oßwald; Christoph Zippel; Zahid Hassan; Martin Nieger; Stefan Bräse
Source:
RSC advances 2022 v.12 no.6 pp. 3309-3312
ISSN:
2046-2069
Subject:
additives; aromatic hydrocarbons; catalysts; methodology; nanomaterials
Abstract:
... A new versatile method for the C–P bond formation of (hetero)aryl halides with trimethyl phosphite via a UV-induced photo-Arbuzov reaction, accessing diverse phosphonate-grafted arenes, heteroarenes and co-facially stacked cyclophanes under mild reaction conditions without the need for catalyst, additives, or base is developed. The UV-induced photo-Arbuzov protocol has a wide synthetic scope with ...
DOI:
10.1039/d2ra00094f

2. Amine-based synthesis of Fe₃C nanomaterials: mechanism and impact of synthetic conditions

Author:
Daniel P. Harris; Cheng Wan; Yuqi She; Brittney R. Beck; Daniel S. Forbes; Brian M. Leonard
Source:
Zeitschrift für Naturforschung 2021 v.76 no.10-12 pp. 803-810
ISSN:
1865-7117
Subject:
carbon; catalysts; electrochemistry; iron; nitrides; nitrogen; oxygen production; particle size; temperature
Abstract:
... Iron-based catalysts are a preferred variant of metal catalysts due to the high abundance of iron on earth. Iron carbide has been investigated in recent times as an electrochemical catalyst due to its potential as a great ORR catalyst. Using a unique amine-metal complex anion composite (AMAC) method, iron carbide/nitride nanoparticles (Fe₃C and Fe₃₋ₓN) were synthesized through varying several reac ...
DOI:
10.1515/znb-2021-0134

3. Application of magnetic nanomaterials in electroanalytical methods: A review

Author:
Mazaher Ahmadi; Arash Ghoorchian; Kheibar Dashtian; Mahdie Kamalabadi; Tayyebeh Madrakian; Abbas Afkhami
Source:
Talanta 2021 v.225 pp. 121974
ISSN:
0039-9140
Subject:
biocompatibility; catalase; catalysts; catalytic activity; detection; electrochemistry; electrodes; ferromagnetism; fields; iron; nanomaterials; nickel; paper; peroxidase; sorbents; superoxide dismutase; toxicity
Abstract:
... Magnetic nanomaterials (MNMs) have gained high attention in different fields of studies due to their ferromagnetic/superparamagnetic properties and their low toxicity and high biocompatibility. MNMs contain magnetic elements such as iron and nickel in metallic, bimetallic, metal oxide, and mixed metal oxide. In electroanalytical methods, MNMs have been applied as sorbents for sample preparation be ...
DOI:
10.1016/j.talanta.2020.121974

4. Degradation of petroleum hydrocarbons in soil via advanced oxidation process using peroxymonosulfate activated by nanoscale zero-valent iron

Author:
Rishikesh Bajagain; Seung-Woo Jeong
Source:
Chemosphere 2021 v.270 pp. 128627
ISSN:
0045-6535
Subject:
aqueous solutions; butanol; catalysts; cobalt; diesel fuel; ethanol; free radical scavengers; hydrocarbons; iron; isopropyl alcohol; nanomaterials; nitrobenzenes; oxidants; oxidation; petroleum; polluted soils; reactive oxygen species; soil pH; soil pollution; soil quality; soil remediation; sulfates
Abstract:
... Recently, the use of nanoscale zero-valent iron (nZVI) for removal of organic contaminants from aqueous and soil system has increased. In this study, we employ nZVI to activate peroxymonosulfate (PMS) for the degradation of total petroleum hydrocarbons (TPHs) in aged diesel-contaminated soil. Upon PMS activation by nZVI, PMS produces more highly reactive oxygen species (ROS) in both aqueous soluti ...
DOI:
10.1016/j.chemosphere.2020.128627

5. Metal-free amino-graphdiyne for applications in electrocatalytic hydrogen evolution

Author:
Feng He; Chengyu Xing; Yurui Xue
Source:
Journal of catalysis 2021 v.395 pp. 129-135
ISSN:
0021-9517
Subject:
alkynes; carbon; catalysts; catalytic activity; density functional theory; durability; hydrogen production; knowledge; molecular dynamics; nanomaterials
Abstract:
... Graphdiyne-based metal-free catalysts demonstrate outstanding performances in electrocatalysis. In order to accurately understand the activity origin of metal-free electrocatalytic hydrogen production at the atomic level, we have successfully designed and prepared a new metal-free catalyst of 1,2,4-triamino-graphdiyne (TAGDY). Structural characterizations showed that TAGDY has unique nanostructure ...
DOI:
10.1016/j.jcat.2020.12.033

6. Metallenes as functional materials in electrocatalysis

Author:
P. Prabhu; Jong-Min Lee
Source:
Chemical Society reviews 2021 v.50 no.12 pp. 6700-6719
ISSN:
1460-4744
Subject:
catalysts; electrochemistry; engineering; engineers; fields; metals; nanomaterials; new family; physicochemical properties
Abstract:
... Metallenes, atomically thin layers composed primarily of under-coordinated metal atoms, have emerged as the newest members in the family of 2D nanomaterials. Furthermore, the remarkable physicochemical properties associated with metallenes coupled with the ease of applying chemical modifications result in exciting opportunities towards catalyst engineering for electrochemical conversions. Especial ...
DOI:
10.1039/d0cs01041c

7. Pt-Sn-Co nanocubes as highly active catalysts for ethanol electro-oxidation

Author:
Rubén Rizo; Arno Bergmann; Janis Timoshenko; Fabian Scholten; Clara Rettenmaier; Hyo Sang Jeon; Yen-Ting Chen; Aram Yoon; Alexander Bagger; Jan Rossmeisl; Beatriz Roldan Cuenya
Source:
Journal of catalysis 2021 v.393 pp. 247-258
ISSN:
0021-9517
Subject:
X-ray absorption spectroscopy; X-ray photoelectron spectroscopy; acetaldehyde; acetic acid; alloys; carbon dioxide; catalysts; catalytic activity; commercialization; design; electrochemistry; ethanol; fuel cells; leaching; ligands; mass spectrometry; nanomaterials; oxidation
Abstract:
... Direct ethanol fuel cells are among the most promising clean electrochemical power sources. Nevertheless, the high cost and low efficiency of the Pt-based catalysts hinder their commercialization. Here, Pt-Sn-Co nanocubes with a Pt- and Sn-rich shell show improved performance towards the electrochemical ethanol oxidation reaction (EOR). Mechanistic and structural insights were obtained by synergis ...
DOI:
10.1016/j.jcat.2020.11.017

8. Pt3Mn alloy nanostructure with high-index facets by Sn doping modified for highly catalytic active electro-oxidation reactions

Author:
Yunrui Li; Yao Wang; Shuna Li; Mingxuan Li; Yujie Liu; Xu Fang; Xiaoping Dai; Xin Zhang
Source:
Journal of catalysis 2021 v.395 pp. 282-292
ISSN:
0021-9517
Subject:
activation energy; alloys; catalysts; catalytic activity; design; exhibitions; formic acid; mass; methanol; mor; nanomaterials
Abstract:
... Modulating the surface structure of Pt-based alloy by oxyphilic component has been proven significantly enhancement of activity and stability for electro-oxidation of small organic molecules. Inspired by these advances, the oxyphilic metal Sn is implanted into the surface of Pt₃Mn concave nanocubes (CNCs) to explore the promoting effect of foreign component on stepped Pt based alloy surface in thi ...
DOI:
10.1016/j.jcat.2020.12.034

9. Scalable Synthesis of Pt/SrTiO₃ Hydrogenolysis Catalysts in Pursuit of Manufacturing-Relevant Waste Plastic Solutions

Author:
Ian L. Peczak; Robert M. Kennedy; Ryan A. Hackler; Rongyue Wang; Youngho Shin; Massimiliano Delferro; Kenneth R. Poeppelmeier
Source:
ACS applied materials & interfaces 2021 v.13 no.49 pp. 58691-58700
ISSN:
1944-8252
Subject:
adsorption; batch systems; catalysts; hot water treatment; pH; platinum; polyethylene
Abstract:
... An improved hydrothermal synthesis of shape-controlled, size-controlled 60 nm SrTiO₃ nanocuboid (STO NC) supports, which facilitates the scalable creation of platinum nanoparticle catalysts supported on STO (Pt/STO) for the chemical conversion of waste polyolefins, is reported herein. This synthetic method (1) establishes that STO nucleation prior to the hydrothermal treatment favors nanocuboid fo ...
DOI:
10.1021/acsami.1c18687

10. Tailoring surface morphology of heterostructured iron-based Fenton catalyst for highly improved catalytic activity

Author:
Shun-Xing Liang; Qiaoyue Zhang; Zhe Jia; Wenchang Zhang; Weimin Wang; Lai-Chang Zhang
Source:
Journal of colloid and interface science 2021 v.581 pp. 860-873
ISSN:
0021-9797
Subject:
active sites; alloys; annealing; catalysts; catalytic activity; chemical composition; electrochemistry; electron transfer; glass; iron; milling; nanomaterials; remediation; surface area; wastewater; wastewater treatment
Abstract:
... Due to the great limitation of glass forming ability, precisely controlling the chemical compositions of metallic glasses (MGs) still dramatically inhibits their widespread applications in wastewater remediation. Here, heterostructured catalysts were exploited by rapid annealing of Fe-based MGs and subsequent ball milling (BM) as advanced alternatives for amorphous counterparts in Fenton-like proc ...
DOI:
10.1016/j.jcis.2020.07.138

11. A Single-Atomic Noble Metal Enclosed Defective MOF via Cryogenic UV Photoreduction for CO Oxidation with Ultrahigh Efficiency and Stability

Author:
Shuailong Guo; Yunkun Zhao; Chengxiong Wang; Haoqing Jiang; Gary J. Cheng
Source:
ACS applied materials & interfaces 2020 v.12 no.23 pp. 26068-26075
ISSN:
1944-8252
Subject:
carbon monoxide; catalysts; catalytic activity; crystal structure; manufacturing; nanomaterials; oxidation; photoreduction; platinum; porosity; temperature
Abstract:
... Noble metal single-atom catalysts (SACs) can provide maximized interaction with the reactants and tunable electronic structure dictated by the coordinated support, thus enabling unprecedented high activity at a reduced noble metal cost. However, the practical utilization of SACs that enabled heterogeneous catalysis has the bottlenecks in high manufacturing cost, low catalytic efficiency, and low a ...
DOI:
10.1021/acsami.0c06898

12. A review of non-precious metal single atom confined nanomaterials in different structural dimensions (1D–3D) as highly active oxygen redox reaction electrocatalysts

Author:
Jin Liu; Hao Zhang; Ming Qiu; Zehua Peng; Michael K. H. Leung; Wen-Feng Lin; Jin Xuan
Source:
Journal of materials chemistry A 2020 v.8 no.5 pp. 2222-2245
ISSN:
2050-7496
Subject:
batteries; catalysts; catalytic activity; electrochemistry; energy; fuel cells; hydrogen production; nanomaterials; oxygen; oxygen production; redox reactions
Abstract:
... Non-precious-metal single atom (NPM-SA) confined nanomaterials with maximum metal atom utilization have recently attracted particular interest, providing opportunities for exploiting novel heterogeneous electrocatalysts with low cost and high efficiency. The applications of non-precious-metal single-atom catalysts (NPM-SACs) have been extensively developed in electrochemical energy technologies su ...
DOI:
10.1039/c9ta11852g

13. Advanced framework-modified POM@ZIF-67 nanocomposites as enhanced oxygen evolution reaction electrocatalysts

Author:
Víctor K. Abdelkader-Fernández; Diana M. Fernandes; Salete S. Balula; Luís Cunha-Silva; Cristina Freire
Source:
Journal of materials chemistry A 2020 v.8 no.27 pp. 13509-13521
ISSN:
2050-7496
Subject:
catalysts; catalytic activity; electrochemistry; encapsulation; imidazole; nanocomposites; nanomaterials; oxygen production; powders
Abstract:
... The smart assembly of Co-containing polyoxometalates (POMs) and Co-based zeolitic imidazole frameworks (ZIF-67) is a promising tool to produce active electrocatalysts for the oxygen evolution reaction (OER). The encapsulation of SiW₁₁Co inside ZIF-67 cavities via ‘in situ’ synthesis produced two novel POM@ZIF-67 nanocomposites with low and high POM loadings—SiW₁₁Co@ZIF-67 and SiW₁₁Co[h]@ZIF-67, re ...
DOI:
10.1039/d0ta03898a

14. An amorphous lanthanum–iridium solid solution with an open structure for efficient water splitting

Author:
Wei Sun; Chenglong Ma; Xinlong Tian; Jianjun Liao; Ji Yang; Chengjun Ge; Weiwei Huang
Source:
Journal of materials chemistry A 2020 v.8 no.25 pp. 12518-12525
ISSN:
2050-7496
Subject:
catalysts; crystal structure; electrochemistry; ions; iridium; nanomaterials; oxides
Abstract:
... The lanthanum–iridium amorphous metal oxides with a novel flute-like nanostructure (La–Ir NF) were synthesized from the perspective of controlling the material's nanoscale morphology and crystal structure. The iridium mass ratio of the prepared La–Ir NF was only 38.8% (wt%), and it shows outstanding OER activity with a lower onset potential and Tafel slope, as well as a 12-fold higher mass activit ...
DOI:
10.1039/d0ta03351k

15. An ultrasensitive biosensor for colorimetric detection of Salmonella in large-volume sample using magnetic grid separation and platinum loaded zeolitic imidazolate Framework-8 nanocatalysts

Author:
Lei Wang; Xiaoting Huo; Lingyan Zheng; Gaozhe Cai; Yuhe Wang; Ning Liu; Maohua Wang; Jianhan Lin
Source:
Biosensors & bioelectronics 2020 v.150 pp. 111862
ISSN:
0956-5663
Subject:
Salmonella Typhimurium; bacteria; biosensors; catalysts; catalytic activity; chicken carcasses; colorimetry; detection limit; food pathogens; food safety; foodborne illness; hydrogen; magnetism; nanomaterials; peroxidase; platinum; risk factors; wavelengths
Abstract:
... Salmonella is the leading risk factor in food safety. Rapid, sensitive and accurate detection of Salmonella is a key to prevent and control the outbreaks of foodborne diseases caused by Salmonella. In this study, we reported a colorimetric biosensor for ultrasensitive detection of Salmonella Typhimurium using a magnetic grid separation column to efficiently separate target bacteria from large volu ...
DOI:
10.1016/j.bios.2019.111862

16. Artificial neural network modeling of performance, emission, and vibration of a CI engine using alumina nano-catalyst added to diesel-biodiesel blends

Author:
Seyyed Hassan Hosseini; Ahmad Taghizadeh-Alisaraei; Barat Ghobadian; Ahmad Abbaszadeh-Mayvan
Source:
Renewable energy 2020 v.149 pp. 951-961
ISSN:
0960-1481
Subject:
algorithms; aluminum oxide; atmospheric pressure; carbon dioxide; carbon monoxide; catalysts; emissions; energy use and consumption; fuels; gases; hydrocarbons; nanomaterials; neural networks; nitric oxide; oils; oxygen; relative humidity; renewable energy sources; statistical analysis; temperature; torque; vibration; viscosity
Abstract:
... In recent years, added nano-catalysts to fuels has improved their thermo-physical properties. In present study, the alumina as additive with concentrations of 30, 60, and 90 ppm were added to B5 and B10 blends for evaluation of the engine performance, emissions, and vibration levels. An ANN model based on standard back-propagation learning algorithm for the engine was developed. Multi-layer percep ...
DOI:
10.1016/j.renene.2019.10.080

17. Atom-precise incorporation of platinum into ultrafine transition metal carbides for efficient synergetic electrochemical hydrogen evolution

Author:
Xingxing Pan; Shuanglong Lu; Duo Zhang; Ye Zhang; Fang Duan; Han Zhu; Hongwei Gu; Shuao Wang; Mingliang Du
Source:
Journal of materials chemistry A 2020 v.8 no.9 pp. 4911-4919
ISSN:
2050-7496
Subject:
active sites; carbides; catalysts; catalytic activity; electrochemistry; engineering; hydrogen production; nanomaterials; platinum; pyrolysis
Abstract:
... Exploring highly efficient and stable electrocatalysts for the hydrogen evolution reaction (HER) has captured widespread attention. Atomic engineering of material structures paves a powerful pathway to develop advanced electrocatalysts by virtue of precisely modulating the reactivity and maximizing the atomic efficiency, although it still stands as a big challenge. In this work, a new method of mu ...
DOI:
10.1039/c9ta12613a

18. Bandgaps of noble and transition metal/ZIF-8 electro/catalysts: a computational study

Author:
Alireza Baghban; Sajjad Habibzadeh; Farzin Zokaee Ashtiani
Source:
RSC advances 2020 v.10 no.39 pp. 22929-22938
ISSN:
2046-2069
Subject:
catalysts; catalytic activity; cobalt; copper; density functional theory; electrochemistry; energy; hydrogen production; hydrogenation; iron; manganese; mechanical models; nanomaterials; nickel; palladium; platinum; quantum mechanics; support vector machines
Abstract:
... Zeolitic imidazolate frameworks (ZIFs) are designed with metals as center atoms, connected by imidazole-like linkers. The created structures have been employed considerably in the field of advanced energy materials, including catalysis/electrocatalysis and energy storage and harvesting applications. In the present study, the bandgaps of pristine and doped ZIF-8 (using noble and transition metal do ...
DOI:
10.1039/d0ra02943b

19. Bimetallic Metal–Organic Framework-Derived Hybrid Nanostructures as High-Performance Catalysts for Methane Dry Reforming

Author:
Teng-Yun Liang; Duraisamy Senthil Raja; Kah Chun Chin; Chun-Lung Huang; Sumathi A/P Sethupathi; Loong Kong Leong; De-Hao Tsai; Shih-Yuan Lu
Source:
ACS applied materials & interfaces 2020 v.12 no.13 pp. 15183-15193
ISSN:
1944-8252
Subject:
aldehydes; ammonia; carbon dioxide; carbon monoxide; catalysts; cobalt; coordination compounds; feedstocks; greenhouse gases; hydrogen; industrial applications; methane; methanol; nanocomposites; nanomaterials; nickel; synthesis gas; temperature
Abstract:
... Syngas, consisting of equimolar CO and H₂, is an important feedstock for large-scale production of a wide range of commodity chemicals including aldehyde, methanol, ammonia, and other oxygenated chemicals. Dry reforming of methane (DRM), proceeding by reacting greenhouse gases, CO₂ and CH₄, at high temperatures in the presence of a metal catalyst, is considered one of the most environmentally frie ...
DOI:
10.1021/acsami.0c00086

20. Boosting carbon dioxide electroreduction to C1 feedstocks via theory-guided tailoring oxygen defects in porous tin-oxide nanocubes

Author:
Haichuan He; Kang Liu; Kaixin Liang; Abdulhadi Mustapha; Zheng Wang; Linlin Wu; Congcheng Yang; Liu Deng; Shaojun Guo; You-Nian Liu
Source:
Journal of catalysis 2020 v.385 pp. 246-254
ISSN:
0021-9517
Subject:
active sites; carbon; carbon dioxide; catalysts; density functional theory; electrochemistry; feedstocks; flue gas; hydrogen; nanomaterials; oxygen; tin dioxide
Abstract:
... Metal-oxide catalysts have great potential in efficient CO₂ electroreduction (CO₂ER). Unfortunately, many catalysts exhibit limited selectivity for carbon products at the high current density. Here, density functional theory is applied to analyzethe active sites on SnO₂ matrix surface. The theoretical analysis indicates that the elimination of oxygen atoms from SnO₂ matrix can significantly improv ...
DOI:
10.1016/j.jcat.2020.03.015

21. Cascade reaction engineering on zirconia-supported mesoporous MFI zeolites with tunable Lewis–Brønsted acid sites: a case of the one-pot conversion of furfural to γ-valerolactone

Author:
Kyung Duk Kim; Jaeheon Kim; Wey Yang Teoh; Jeong-Chul Kim; Jun Huang; Ryong Ryoo
Source:
RSC advances 2020 v.10 no.58 pp. 35318-35328
ISSN:
2046-2069
Subject:
Bronsted acids; Lewis acids; aluminum silicates; catalysts; catalytic activity; furfural; lactones; nanomaterials; porous media; zeolites; zirconium oxide
Abstract:
... Catalytic cascade reactions are strongly desired as a potential means of combining multistep reactions into a single catalytic reactor. Appropriate catalysts composed of multi-reactive sites to catalyze cascade reactions in a sequential fashion are central to such efforts. Here, we demonstrate a bifunctional zeolite catalyst with close proximity of Brønsted and Lewis acid sites through the synthes ...
DOI:
10.1039/d0ra06915a

22. Chitosan cross-linked poly(aminoanthraquinone)/Prussian blue ternary nitrogen precursor-derived Fe–N–C oxygen reduction catalysts for microbial fuel cells and zinc–air batteries

Author:
Guoquan Zhang; Li Li; Mengyao Chen; Fenglin Yang
Source:
Journal of materials chemistry A 2020 v.8 no.18 pp. 9256-9267
ISSN:
2050-7496
Subject:
active sites; batteries; carbon; catalysts; chitosan; cost effectiveness; crosslinking; durability; electric potential difference; electrochemistry; energy conversion; microbial fuel cells; moieties; nanocomposites; nanomaterials; nitrogen; oxygen; platinum; pyrolysis; quinones; renewable energy sources; temperature
Abstract:
... Exploiting high-efficiency, cost-effective and robust platinum group metal-free (PGM-free) oxygen reduction reaction (ORR) electrocatalysts is significantly vital for the development of renewable energy storage and conversion technologies. However, the rational design of PGM-free catalysts and accurate control of the well-defined active sites are still the tough challenges. Herein, we report a com ...
DOI:
10.1039/d0ta00306a

23. Confinement Effect of Mesopores: In Situ Synthesis of Cationic Tungsten-Vacancies for a Highly Ordered Mesoporous Tungsten Phosphide Electrocatalyst

Author:
Feng Li; Chengru Wang; Xiaocang Han; Xiaoqian Feng; Yuqi Qu; Jing Liu; Wenlong Chen; Liping Zhao; Xuefeng Song; Hong Zhu; Han Chen; Min Zhao; Zhao Deng; Jianbo Wu; Peng Zhang; Lian Gao
Source:
ACS applied materials & interfaces 2020 v.12 no.20 pp. 22741-22750
ISSN:
1944-8252
Subject:
active sites; catalysts; catalytic activity; density functional theory; electrochemistry; engineering; hydrogen production; nanomaterials; phosphides; porous media; tungsten
Abstract:
... Engineering defects in crystalline electrocatalysts is an effective approach to tailor the electronic structure and number of active sites, which are essential for the intrinsic activity of the hydrogen evolution reaction (HER). Unlike previously reported methods, we demonstrate a confinement effect using a mesoporous template for in situ fabrication of cationic W vacancies in as-prepared ordered ...
DOI:
10.1021/acsami.9b22761

24. Controllable Heteroatom Doping Effects of CrₓCo₂–ₓP Nanoparticles: a Robust Electrocatalyst for Overall Water Splitting in Alkaline Solutions

Author:
Jun Wu; Peng Li; Andres Parra-Puerto; Shuang Wu; Xiaoqian Lin; Denis Kramer; Shengli Chen; Anthony Kucernak
Source:
ACS applied materials & interfaces 2020 v.12 no.42 pp. 47397-47407
ISSN:
1944-8252
Subject:
catalysts; hydrogen production; oxygen production; soot
Abstract:
... The effect of doping Cr on the electrocatalytic activity of Co₂P supported on carbon black (CrₓCo₂–ₓP/CB) for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline solution was investigated. A beneficial improvement in the performance of Co₂P toward HER and OER was discovered. For the HER at −200 mV overpotential, the turnover frequency (TOF) increases almost 6-fold ...
DOI:
10.1021/acsami.0c10441

25. Controllable synthesis for highly dispersed ruthenium clusters confined in nitrogen doped carbon for efficient hydrogen evolution

Author:
Yao Xiao; Wengang Liu; Zhou Zhang; Jian Liu
Source:
Journal of colloid and interface science 2020 v.571 pp. 205-212
ISSN:
0021-9797
Subject:
active sites; adsorption; carbon; catalysts; catalytic activity; density functional theory; glucose; hydrogen production; nanomaterials; nitrogen; organometallic compounds; platinum; pyrolysis; ruthenium
Abstract:
... Modulating the size and dispersion of metal particles is highly desirable in nanocatalysis. Herein highly dispersed ruthenium clusters confined in nitrogen-doped carbon (RuNC) were synthesized by a one-pot pyrolysis of Ru(phen)₃ organometallic compounds and glucose. The size of the Ru clusters was finely controlled at a cluster level (1.7 nm) to expose more catalytic active sites. The interaction ...
DOI:
10.1016/j.jcis.2020.03.048

26. Controlling the C2+ product selectivity of electrochemical CO₂ reduction on an electrosprayed Cu catalyst

Author:
Si Young Lee; Sang Youn Chae; Hyejin Jung; Chan Woo Lee; Dang Le Tri Nguyen; Hyung-Suk Oh; Byoung Koun Min; Yun Jeong Hwang
Source:
Journal of materials chemistry A 2020 v.8 no.13 pp. 6210-6218
ISSN:
2050-7496
Subject:
carbon; carbon dioxide; catalysts; copper; cupric oxide; electrochemistry; ethylene; nanomaterials; porosity; pyrolysis; value added
Abstract:
... Cu catalysts prepared by modifying bulk Cu foils have achieved high performance for value-added C2+ compounds from electrochemical CO₂ reduction (CO₂RR) but the transformation of active sites can be affected by the bulk substrate, which make it complex to design the catalyst. Herein, we newly introduce a simple electrospray pyrolysis method to take advantage of a facile wet-chemical synthesis appl ...
DOI:
10.1039/c9ta13173f

27. Coral-like carbon-wrapped NiCo alloys derived by emulsion aggregation strategy for efficient oxygen evolution reaction

Author:
Xiaolu Zhang; Kuixing Ding; Baicheng Weng; Shijun Liu; Wei Jin; Xiaobo Ji; Jiugang Hu
Source:
Journal of colloid and interface science 2020 v.573 pp. 96-104
ISSN:
0021-9797
Subject:
X-ray absorption spectroscopy; X-ray photoelectron spectroscopy; alloys; carbon; catalysts; catalytic activity; cobalt; durability; electrochemistry; emulsions; graphene oxide; hydrophobicity; nanomaterials; nickel; oxygen production; potassium hydroxide; surfactants; synergism
Abstract:
... The transition metal-based catalysts have great potential to boost the electrocatalytic reactions due to their flexible electronic configuration and low cost. This work developed a facile emulsion aggregation strategy to synthesize coral-like carbon-wrapped NiCo alloy (Co₀.₅Ni₀.₅/rGO) with high oxygen evolution reaction (OER) activity. The effect of alloy composition and GO content on the OER acti ...
DOI:
10.1016/j.jcis.2020.03.124

28. Crystal phase tuning and valence engineering in non-noble catalysts for outstanding overall water splitting

Author:
Kailing Zhou; Qianqian Zhang; Jingbing Liu; Hao Wang; Yongzhe Zhang
Source:
Journal of materials chemistry A 2020 v.8 no.8 pp. 4524-4532
ISSN:
2050-7496
Subject:
active sites; alloys; annealing; catalysts; cobalt; durability; electric potential difference; electrochemistry; electron transfer; engineering; hydrogen production; nanomaterials; oxygen production; surface area
Abstract:
... Designing high-efficiency non-noble electrocatalysts with a bifunctional feature for the durable hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is desirable for large-scale hydrogen generation. Here, a self-supported CoNiO₂/Ni₀.₄₆Co₀.₅₄ hybrid catalyst with an open 3D nanostructure is constructed using electrochemical co-deposition to fabricate the Ni₀.₄₆Co₀.₅₄ parent alloy ...
DOI:
10.1039/d0ta00234h

29. Decomposition of pharmaceutical micropollutant – diclofenac by photocatalytic nanopowder mixtures in aqueous media: effect of optimization parameters, identification of intermediates and economic considerations

Author:
Mladenka Novakovic; Goran Strbac; Maja Petrovic; Dragana Strbac; Ivana Mihajlovic
Source:
Journal of environmental science and health 2020 v.55 no.4 pp. 483-497
ISSN:
1532-4117
Subject:
catalysts; diclofenac; energy costs; nanomaterials; operating costs; pH; photocatalysis; pollutants; tandem mass spectrometry; tin dioxide; titanium dioxide; wastewater; zinc oxide
Abstract:
... This study evaluates application of three different nanopowder mixtures for decomposition of diclofenac (DCF), one of frequently detected pharmaceutical in wastewater. Analyzed three photocatalytic mixtures ZnO/SnO₂, ZnO/TiO₂ and ZnO/In₂O₃ are for the first time used for diclofenac degradation. A set of experiments were performed in order to investigate influence of catalyst concentration (0.10–0. ...
DOI:
10.1080/10934529.2019.1701895

30. Design and In Situ Synthesis of Titanium Carbide/Boron Nitride Nanocomposite: Investigation of Electrocatalytic Activity for the Sulfadiazine Sensor

Author:
Thangavelu Kokulnathan; Elumalai Ashok Kumar; Tzyy-Jiann Wang
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.33 pp. 12471-12481
ISSN:
2168-0485
Subject:
boron nitride; catalysts; catalytic activity; detection limit; durability; electrochemistry; electrodes; electron microscopy; humans; monitoring; nanocomposites; nanomaterials; sensors (equipment); spectroscopy; sulfadiazine; surface area; titanium; urine
Abstract:
... Two-dimensional (2D) nanomaterials are considered a rising star in diverse electrochemical technologies due to their special characteristics. We report here the design and synthesis of 2D titanium carbide/boron nitride nanocomposite via the sonochemical method. The successfully produced TiC/BN nanocomposites were characterized by in-depth electron microscopic and spectroscopic methods and served a ...
DOI:
10.1021/acssuschemeng.0c03281

31. Designing of waste fruit peels extracted cellulose supported molybdenum sulfide nanostructures for photocatalytic degradation of RhB dye and industrial effluent

Author:
Neha Tavker; Manu Sharma
Source:
Journal of environmental management 2020 v.255 pp. 109906
ISSN:
0301-4797
Subject:
X-ray photoelectron spectroscopy; agricultural wastes; catalysts; cellulose; dyes; fruit peels; industrial effluents; light; molybdenum; molybdenum disulfide; nanomaterials; oxidation; photocatalysis; photolysis
Abstract:
... Waste fruit peels which are usually discarded as agricultural wastes were utilized to isolate cellulose. The varied amount of isolated cellulose was used as sustainable support with hydrothermally synthesized molybdenum sulphide (MoS₂) nano-petals via in-situ approach. The phase purity of all synthesized nanostructures was confirmed by PXRD whereas different oxidation states along with the interac ...
DOI:
10.1016/j.jenvman.2019.109906

32. Direct production of hexyl levulinate as a potential fuel additive from glucose catalyzed by modified dendritic fibrous nanosilica

Author:
Najafi Chermahini; Zahra Mohammadbagheri; Alireza Najafi Chermahini
Source:
Renewable energy 2020 v.147 pp. 2229-2237
ISSN:
0960-1481
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; catalysts; catalytic activity; fuels; glucose; hot water treatment; nanomaterials; renewable energy sources; scanning electron microscopy; silica; temperature; transmission electron microscopy; ultrasonics; zinc
Abstract:
... Ultrasonic as a fast and powerful method was applied to prepare dendritic fibrous nanosilica (DFNSU) and the properties of this silica were compared with those of DFNS prepared by hydrothermal method (DFNSH). Using this support, a series of the Zn/DFNSU catalysts were prepared by incorporation of different zinc values using the co-condensation technique. The prepared catalysts were characterized b ...
DOI:
10.1016/j.renene.2019.10.031

33. Effect of Biodiesel impurities (K, Na, P) on non-catalytic and catalytic activities of Diesel soot in model DPF regeneration conditions

Author:
Hailong Zhang; Jishuang He; Shanshan Li; Eduard Emil Iojoiu; Maria Elena Galvez; Haifeng Xiong; Patrick Da Costa; Yaoqiang Chen
Source:
Fuel processing technology 2020 v.199 pp. 106293
ISSN:
0378-3820
Subject:
Raman spectroscopy; X-ray photoelectron spectroscopy; biodiesel; catalysts; catalytic activity; filters; hydrogen; models; nanomaterials; nitric oxide; nitrogen dioxide; oxidation; oxygen; physicochemical properties; potassium; sodium; soot; transmission electron microscopy
Abstract:
... The impact of Biodiesel impurities (Na, K and P) on the non-catalytic and catalytic reactivity of Diesel soot was evaluated under model DPF (Diesel Particulate Filter) regeneration conditions. Temperature-programmed oxidation (TPO) measurements confirmed that Na and K depositing into soot or on the surface of the catalyst enhanced the oxidative reactivity of soot under both O₂ and NOₓ + O₂ and Na- ...
DOI:
10.1016/j.fuproc.2019.106293

34. Effect of different co-solvents on biodiesel production from various low-cost feedstocks using Sr–Al double oxides

Author:
Indu Ambat; Varsha Srivastava; Sidra Iftekhar; Esa Haapaniemi; Mika Sillanpää
Source:
Renewable energy 2020 v.146 pp. 2158-2169
ISSN:
0960-1481
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; acetone; biodiesel; carbon; catalysts; catalytic activity; cooking fats and oils; fatty acid methyl esters; feedstocks; fuel production; gas chromatography-mass spectrometry; kitchen waste; lard; methanol; nanomaterials; nuclear magnetic resonance spectroscopy; oxides; scanning electron microscopy; stable isotopes; tetrahydrofuran; transesterification; transmission electron microscopy
Abstract:
... The main objective of the present paper comprises the investigation of biodiesel production from low-cost feedstock such as lard oil and waste cooking oil (WCO) using Sr–Al double oxides. Nanocatalyst was characterised FTIR, XRD, SEM, TEM, BET and XPS. The Sr:Al with 3:1 M ratio showed the best catalytic activity in the conversion of both oils to fatty acid methyl ester. The effect of acetone and ...
DOI:
10.1016/j.renene.2019.08.061

35. Effect of g-C3N4 nano-structure on catalytic performance of CoOx/g-C3N4 in catalytic combustion of toluene

Author:
S.-S. Liu; D.-M. Luo; X. Yang; C.-X. Tong; L.-G. Tao; H.-P. Ding; J. Zhang
Source:
International journal of environmental science and technology 2020 v.17 no.5 pp. 3055-3064
ISSN:
1735-1472
Subject:
X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; carbon nitride; catalysts; catalytic activity; cobalt; combustion; desorption; dicyandiamide; graphene; nanomaterials; nitrogen; particle size; scanning electron microscopy; toluene; transmission electron microscopy
Abstract:
... A series of graphitic carbon nitrides (g-C₃N₄) were prepared using different precursors; these g-C₃N₄-supported CoOx catalysts exhibited different catalytic performances in toluene catalytic combustion reaction. The structure of samples was detected by XRD, TEM, SEM, XPS, H₂-TPR, nitrogen adsorption and desorption technique, to build up the structure–performance relationship and uncover the key pr ...
DOI:
10.1007/s13762-020-02659-3

36. Effects of AuCuB Catalysts with Porous Nanostructures on Electrosynthesis of Ammonia

Author:
Ziqiang Wang; Jinhua Niu; You Xu; Liang Wang; Hongjing Wang; Huazhang Liu
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.33 pp. 12588-12594
ISSN:
2168-0485
Subject:
active sites; adsorption; ammonia; boron; catalysts; catalytic activity; electrochemistry; electrosynthesis; energy; nanomaterials; nitrogen
Abstract:
... Electrochemical nitrogen reduction reaction (NRR) has been regarded as an attractive approach for ammonia synthesis under ambient condition, and it is critical to develop efficient catalysts with facile nitrogen adsorption and activation for NRR. Herein, we report the construction of metal–nonmetal AuCuB porous nanostructures (AuCuB PNSs) as highly active electrocatalysts for NRR via a one-step pr ...
DOI:
10.1021/acssuschemeng.0c03970

37. Efficient hydrogen recovery with CoP-NF as cathode in microbial electrolysis cells

Author:
Dandan Liang; Lijuan Zhang; Weihua He; Chao Li; Junfeng Liu; Shaoqin Liu; Hyung-Sool Lee; Yujie Feng
Source:
Applied energy 2020 v.264 pp. 114700
ISSN:
0306-2619
Subject:
catalysts; catalytic activity; cathodes; cost effectiveness; electric potential difference; electricity; electrochemistry; electrolytes; electron transfer; energy efficiency; energy recovery; foams; hydrogen; hydrogen production; microbial electrolysis cells; nanomaterials; nickel; phosphates; platinum; surface area; voltammetry; waste utilization; wastewater
Abstract:
... The emerging microbial electrolysis cell (MEC) is of great potential for energy recovery from wastewater as hydrogen, while the application of MECs required cost-effective, scalable cathodes. Here, the phosphating cobalt (CoP) acicular nanoarray in-situ growing on a 3D commercial nickel foam (NF) matrix without binder demonstrated outstanding electrocatalytic activity. The nano-CoP coated NF (CoP- ...
DOI:
10.1016/j.apenergy.2020.114700

38. Efficient syngas production via dry reforming of renewable ethanol over Ni/KIT-6 nanocatalysts

Author:
Yichen Wei; Weijie Cai; Shiji Deng; Zhongcheng Li; Hao Yu; Shaoyin Zhang; Zhihui Yu; Li Cui; Fengzuo Qu
Source:
Renewable energy 2020 v.145 pp. 1507-1516
ISSN:
0960-1481
Subject:
Raman spectroscopy; X-ray diffraction; carbon; carbon dioxide; catalysts; encapsulation; ethanol; nanomaterials; nickel; renewable energy sources; scanning electron microscopy; silica; synthesis gas; transmission electron microscopy
Abstract:
... In this work, a Ni/KIT-6 catalyst with the highly uniform Ni dispersion was synthesized by a facile methanol-assisted co-impregnation technique and its activity towards to CO₂ reforming of renewable ethanol was depicted for syngas production and CO₂ elimination. Herein, its physicochemical features were determined in detail by various characterization technique including XRD, TPR, Raman, SEM and T ...
DOI:
10.1016/j.renene.2019.07.077

39. Electrochemical ammonia synthesis catalyzed with a CoFe layered double hydroxide – A new initiative in clean fuel synthesis

Author:
Lingling Qiao; Guoyi Duan; Sheng Zhang; Yuan Ren; Yanzhi Sun; Yang Tang; Pingyu Wan; Ran Pang; Yongmei Chen; Armistead G. Russell; Maohong Fan
Source:
Journal of cleaner production 2020 v.250 pp. 119525
ISSN:
0959-6526
Subject:
adsorption; ammonia; catalysts; catalytic activity; cobalt; electrochemistry; electrons; energy use and consumption; fossil fuels; greenhouse gas emissions; hot water treatment; iron; models; nanomaterials; nitrogen; protons; sustainable technology
Abstract:
... Electrochemical ammonia synthesis is regarded as a green, clean, and sustainable technology alternative to the Haber-Bosch process to reduce fossil fuel consumption and greenhouse gas emission. In this research, an earth-abundant CoFe layered double hydroxide was prepared with a simple one-step hydrothermal method and was employed as a promising catalyst for electrochemical ammonia synthesis. The ...
DOI:
10.1016/j.jclepro.2019.119525

40. Energy-Efficient Hydrogen Evolution Reactions via Hydrazine Oxidation over Facile Synthesis of Cobalt Tetraoxide Electrodes

Author:
Xiaohu Xu; Tao Wang; Lijuan Dong; Wenbo Lu; Xiangyang Miao
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.21 pp. 7973-7980
ISSN:
2168-0485
Subject:
ambient temperature; catalysts; catalytic activity; cobalt; cobalt oxide; electric potential difference; electrochemistry; electrodes; energy conservation; energy efficiency; foams; hydrazine; hydrogen; hydrogen production; nanomaterials; oxidation; oxygen production
Abstract:
... Clean hydrogen energy is regarded as a promising alternative in terms of energy conversion and storage. Meanwhile, transitional metal oxides (TMOs) have stimulated more and more research attention because of their unique performance, holding broad prospects in expediting the tardy oxygen evolution reaction (OER) in electrolyzing water. However, facile and highly efficient synthesis of TMOs to garn ...
DOI:
10.1021/acssuschemeng.0c02061

41. Engineering 3D hierarchical thorn-like PtPdNiCu alloyed nanotripods with enhanced performances for methanol and ethanol electrooxidation

Author:
Yi-Ge Feng; Hua-Jie Niu; Li-Ping Mei; Jiu-Ju Feng; Ke-Ming Fang; Ai-Jun Wang
Source:
Journal of colloid and interface science 2020 v.575 pp. 425-432
ISSN:
0021-9797
Subject:
carbon; catalysts; catalytic activity; copper; dispersants; electrochemistry; engineering; ethanol; fuel cells; methanol; nanomaterials; nickel; oxidation; palladium; platinum; potassium hydroxide
Abstract:
... Developing efficient and stable electrocatalysts with three-dimensional (3D) hierarchical nanostructures is extremely important in practical applications of direct alcohol fuel cells. Herein, 3D hierarchical thorn-like multi-metallic PtPdNiCu alloyed nanotripods (PtPdNiCu TNTPs) were efficiently fabricated by a one-pot aqueous method, in which Pluronic F127 performed as the structure-director and ...
DOI:
10.1016/j.jcis.2020.04.120

42. Facile Fabrication of Octahedral CdS–ZnS by Cation Exchange for Photocatalytic Toluene Selective Oxidation

Author:
Fan Liu; Chen-Xi Xiao; Ling-Hu Meng; Lang Chen; Qi Zhang; Jia-Bin Liu; Sheng Shen; Jun-Kang Guo; Chak-Tong Au; Shuang-Feng Yin
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.2 pp. 1302-1310
ISSN:
2168-0485
Subject:
benzaldehyde; catalysts; cation exchange; hot water treatment; nanomaterials; oxidation; photocatalysis; solvents; surface area; toluene; zinc
Abstract:
... Octahedral CdS–ZnS composites were synthesized using a simple method of cation exchange and hydrothermal treatment, using Cd₃(C₃N₃S₃)₂ (denoted as Cd₃(TMT)₂) as a precursor and Zn²⁺ for ion exchange. In the spontaneous ion exchange process, there is the formation of compact heterojunctions and three-dimensional octahedral structures. By controlling the ion exchange level, the composition of (CdₓZn ...
DOI:
10.1021/acssuschemeng.9b06802

43. Flower-like platinum-cobalt-ruthenium alloy nanoassemblies as robust and highly efficient electrocatalyst for hydrogen evolution reaction

Author:
Hong-Yan Chen; Hua-Jie Niu; Xiaohong Ma; Jiu-Ju Feng; Xuexiang Weng; Hong Huang; Ai-Jun Wang
Source:
Journal of colloid and interface science 2020 v.561 pp. 372-378
ISSN:
0021-9797
Subject:
alloys; catalysts; catalytic activity; chlorides; cobalt; electrochemistry; electrolysis; fuel cells; guidelines; hydrogen; hydrogen production; nanomaterials; platinum; quaternary ammonium compounds; ruthenium
Abstract:
... Exploring hydrogen evolution reaction (HER) catalyst with highly catalytic features in alkaline conditions is considered as significance for water splitting. In this study, a general and simple method was developed to prepare flower-like platinum-cobalt-ruthenium alloy nanoassemblies (PtCoRu NAs) by using murexide and cetyltrimethylammonium chloride (CTAC) as the co-structure-directing agents. Ben ...
DOI:
10.1016/j.jcis.2019.10.122

44. General Colloidal Synthesis of Transition-Metal Disulfide Nanomaterials as Electrocatalysts for Hydrogen Evolution Reaction

Author:
Christian Meerbach; Benjamin Klemmed; Daniel Spittel; Christoph Bauer; Young Jin Park; René Hübner; Hu Young Jeong; Denise Erb; Hyeon Suk Shin; Vladimir Lesnyak; Alexander Eychmüller
Source:
ACS applied materials & interfaces 2020 v.12 no.11 pp. 13148-13155
ISSN:
1944-8252
Subject:
annealing; catalysts; catalytic activity; electrochemistry; energy; hydrogen production; ligands; molybdenum disulfide; nanosheets; semiconductors
Abstract:
... The material-efficient monolayers of transition-metal dichalcogenides (TMDs) are a promising class of ultrathin nanomaterials with properties ranging from insulating through semiconducting to metallic, opening a wide variety of their potential applications from catalysis and energy storage to optoelectronics, spintronics, and valleytronics. In particular, TMDs have a great potential as emerging in ...
DOI:
10.1021/acsami.9b21607

45. Grain refinement of self-supported copper electrode by multiple-redox treatment for enhanced carbon dioxide electroreduction towards carbon monoxide generation

Author:
Peng Huang; Jinxi Chen; Peilin Deng; Fan Yang; Jing Pan; Kai Qi; Hongfang Liu; Bao Yu Xia
Source:
Journal of catalysis 2020 v.381 pp. 608-614
ISSN:
0021-9517
Subject:
carbon dioxide; carbon monoxide; catalysts; catalytic activity; copper; crystals; electrodes; fuels; nanomaterials; reaction mechanisms
Abstract:
... Inspired by grain refinement in the traditional metal processing, we develop a top-down approach by facile multiple-redox treatment to obtain the downsized Cu crystals over the self-supported copper electrodes for the enhanced selective CO₂ electroreduction. Specifically, the treated copper meshes exhibit an increased activity and selectivity for CO production with high Faradaic efficiency of 78% ...
DOI:
10.1016/j.jcat.2019.12.008

46. Graphene Supported MoS₂ Structures with High Defect Density for an Efficient HER Electrocatalysts

Author:
Jarin Joyner; Eliezer F. Oliveira; Hisato Yamaguchi; Keiko Kato; Soumya Vinod; Douglas S. Galvao; Devashish Salpekar; Soumyabrata Roy; Ulises Martinez; Chandra S. Tiwary; Sehmus Ozden; Pulickel M. Ajayan
Source:
ACS applied materials & interfaces 2020 v.12 no.11 pp. 12629-12638
ISSN:
1944-8252
Subject:
catalysts; catalytic activity; clean energy; electrochemistry; energy; foams; geometry; graphene; graphene oxide; hydrogen production; molecular dynamics; molybdenum; molybdenum disulfide; nanomaterials; van der Waals forces; vapors
Abstract:
... The development of novel efficient and robust electrocatalysts with sufficient active sites is one of the key parameters for hydrogen evolution reactions (HER) catalysis, which plays a key role in hydrogen production for clean energy harvesting. Recently, two-dimensional (2D) materials, especially those based upon transition metal dichalcogenides such as molybdenum disulfide (MoS₂), have gained at ...
DOI:
10.1021/acsami.9b17713

47. Hierarchically porous carbon with pentagon defects as highly efficient catalyst for oxygen reduction and oxygen evolution reactions

Author:
Zhaowei Zeng; Lei Yi; Jianwei He; Qian Hu; Yucong Liao; Yadong Wang; Wenbin Luo; Mu Pan
Source:
Journal of materials science 2020 v.55 no.11 pp. 4780-4791
ISSN:
0022-2461
Subject:
batteries; carbon; carbon dioxide; carbonization; catalysts; catalytic activity; cathodes; electrochemistry; ferrocenes; ferrous chloride; ferrous sulfate; iron; nanomaterials; oxygen; oxygen production; porosity; synergism
Abstract:
... Highly dispersed electrocatalysts and single-atom catalysts receive extensive attention in the field of multiple reactions involving water spitting, oxygen reduction, and CO₂ reduction. Herein, we develop a Fe/N co-doped hierarchically structured porous carbon (Fe/N/C-DT) by the dual-templating approach, involving the incorporation of ferrocenecarboxaldehyde (Fc–CHO) into the polyimide, followed b ...
DOI:
10.1007/s10853-019-04327-5

48. Imprinting isolated single iron atoms onto mesoporous silica by templating with metallosurfactants

Author:
Y. Berro; S. Gueddida; Y. Bouizi; C. Bellouard; El-E. Bendeif; A. Gansmuller; A. Celzard; V. Fierro; D. Ihiawakrim; O. Ersen; M. Kassir; F. El Haj Hassan; S. Lebegue; M. Badawi; N. Canilho; A. Pasc
Source:
Journal of colloid and interface science 2020 v.573 pp. 193-203
ISSN:
0021-9797
Subject:
X-ray diffraction; active sites; catalysts; catalytic activity; hot water treatment; iron; magnetic properties; magnetism; micelles; nanomaterials; nitrogen; nonionic surfactants; nuclear magnetic resonance spectroscopy; oxidation; polymerization; porous media; salts; silica; sorption isotherms; texture; transmission electron microscopy
Abstract:
... One of the main drawbacks of metal-supported materials, traditionally prepared by the impregnation of metal salts onto pre-synthesized porous supports, is the formation of large and unevenly dispersed particles. Generally, the larger are the particles, the lower is the number of catalytic sites. Maximum atom exposure can be reached within single-atom materials, which appear therefore as the next g ...
DOI:
10.1016/j.jcis.2020.03.095

49. Improvement of H₂O₂ Utilization by the Persistent Heterogeneous Fenton Reaction with the Fe₃O₄-Zeolite-Cyclodextrin Composite

Author:
Xiaoping Wang; Wei Liu; Jiayuan Qin; Lecheng Lei
Source:
Industrial & engineering chemistry process design and development 2020 v.59 no.5 pp. 2192-2202
ISSN:
1520-5045
Subject:
beta-cyclodextrin; catalysts; catalytic activity; hydrogen peroxide; iron oxides; nanomaterials; pollutants; wastes; wastewater treatment; zeolites
Abstract:
... Most previous reports related to heterogeneous Fenton focused on improving the catalytic activity of the catalysts but ignored the consumption and utilization efficiency of hydrogen peroxide (H₂O₂), which has caused a large invalid waste of H₂O₂. This paper reports a Fe₃O₄-zeolite-cyclodextrin (F-Z-C) heterogeneous Fenton catalyst that can prolong the reaction duration time and improve the H₂O₂ ut ...
DOI:
10.1021/acs.iecr.9b06091

50. In Situ Friction-Induced Graphene Originating from Methanol at the Sliding Interface between the WC Self-Mated Tribo-Pair and Its Tribological Performance

Author:
Renhui Zhang; Qi Chen; Xiaoqiang Fan; Zhongyi He; Liping Xiong; Mingxue Shen
Source:
Langmuir 2020 v.36 no.14 pp. 3887-3893
ISSN:
1520-5827
Subject:
alloys; catalysts; graphene; lubrication; methanol; nanomaterials; temperature; tungsten oxide
Abstract:
... Alcohols are reported to have superlubricity at low loads during sliding; however, their lubricity under high loads has rarely been reported. Meanwhile, the lubrication mechanism of alcohols under high loads is still not well understood. Here, we first report the lubricity of methanol under 98 N and 1450 rpm and demonstrate the formation of graphene and fullerene-like nanostructures induced by tri ...
DOI:
10.1021/acs.langmuir.9b03963