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1. Morphology inherence from hollow MOFs to hollow carbon polyhedrons in preparing carbon-based electrocatalysts

Author:
Goh, Tian Wei,   et al.   ; Pei, Yuchen; Qi, Zhiyuan; Li, Xinle; Maligal-Ganesh, Raghu V.; Xiao, Chaoxian; Wang, Tianyu; Huang, Wenyu;     Show all 8 Authors
Source:
Journal of materials chemistry A 2017 v.5 no.13 pp. 6186-6192
ISSN:
2050-7496
Subject:
active sites; carbon; carbonization; catalysts; electrochemistry; iron; nanomaterials; silica
Abstract:
... Hollow carbon nanostructures are emerging as advanced electrocatalysts for the oxygen reduction reaction (ORR) due to the effective usage of active sites and the reduced dependence on expensive noble metals. Conventional preparation of these hollow structures is achieved through templates (e.g. SiO₂, CdS, and Ni₃C), which serve to retain the void interiors during carbonization, leading to an essen ...
DOI:
10.1039/c6ta10609a

2. Sub-4 nm PtZn Intermetallic Nanoparticles for Enhanced Mass and Specific Activities in Catalytic Electrooxidation Reaction

Author:
Goh, Tian Wei,   et al.   ; Qi, Zhiyuan; Xiao, Chaoxian; Liu, Cong; Zhou, Lin; Maligal-Ganesh, Raghu; Pei, Yuchen; Li, Xinle; Curtiss, Larry A.; Huang, Wenyu;     Show all 10 Authors
Source:
Journal of the American Chemical Society 2017 v.139 no.13 pp. 4762-4768
ISSN:
1520-5126
Subject:
carbon nanotubes; catalysts; fuel cells; hydroxyl radicals; methanol; methodology; nanoparticles; oxidation; porous media; prediction; silica; temperature; zinc
Abstract:
... Atomically ordered intermetallic nanoparticles (iNPs) have sparked considerable interest in fuel cell applications by virtue of their exceptional electronic and structural properties. However, the synthesis of small iNPs in a controllable manner remains a formidable challenge because of the high temperature generally required in the formation of intermetallic phases. Here we report a general metho ...
DOI:
10.1021/jacs.6b12780

3. Intermetallic structures with atomic precision for selective hydrogenation of nitroarenes

Author:
Goh, Tian Wei,   et al.   ; Pei, Yuchen; Qi, Zhiyuan; Wang, Lin-Lin; Maligal-Ganesh, Raghu V.; MacMurdo, Heather L.; Zhang, Shiran; Xiao, Chaoxian; Li, Xinle; (Feng) Tao, Franklin; Johnson, Duane D.; Huang, Wenyu;     Show all 12 Authors
Source:
Journal of catalysis 2017 v.356 pp. 307-314
ISSN:
0021-9517
Subject:
adsorption; alloys; catalysts; density functional theory; dissociation; geometry; hydrogen; hydrogenation; nanoparticles; porous media; silica
Abstract:
... Bridging the structure-properties relationship of bimetallic catalysts is essential for the rational design of heterogeneous catalysts. Different from random alloys, intermetallic compounds (IMCs) present atomically-ordered structures, which is advantageous for catalytic mechanism studies. We used Pt-based intermetallic nanoparticles (iNPs), individually encapsulated in mesoporous silica shells, a ...
DOI:
10.1016/j.jcat.2017.10.011

4. Room-Temperature Tandem Condensation-Hydrogenation Catalyzed by Porous C₃N₄ Nanosheet-Supported Pd Nanoparticles

Author:
Goh, Tian Wei,   et al.   ; Nie, Renfeng; Chen, Minda; Pei, Yuchen; Zhang, Biying; Qi, Long; Chen, Jingwen; Qi, Zhiyuan; Zhang, Zhiguo; Huang, Wenyu;     Show all 10 Authors
Source:
ACS sustainable chemistry & engineering 2018 v.7 no.3 pp. 3356-3363
ISSN:
2168-0485
Subject:
ambient temperature; carbon nitride; catalysts; catalytic activity; cyclohexanones; hydrogen; hydrogenation; nanoparticles; nanosheets; nitriles; palladium; surface area
Abstract:
... Tandem catalysis, often inspired by biological systems, offers many advantages in the synthesis of highly functionalized small molecules. NH₂-grafted porous C₃N₄ nanosheet with rich N species and surface area of 138 m²/g was fabricated via a NH₃-exfoliation method. After supporting Pd nanoparticles, the resulting bifunctional catalyst (Pd/C₃N₄–NH₂) could catalyze a one-step tandem condensation-hyd ...
DOI:
10.1021/acssuschemeng.8b05531

5. Aerobic oxidation of the C–H bond under ambient conditions using highly dispersed Co over highly porous N-doped carbon

Author:
Goh, Tian-Wei,   et al.   ; Nie, Renfeng; Chen, Jingwen; Chen, Minda; Qi, Zhiyuan; Ma, Tao; Zhou, Lin; Pei, Yuchen; Huang, Wenyu;     Show all 9 Authors
Source:
Green chemistry 2019 v.21 no.6 pp. 1461-1466
ISSN:
1463-9270
Subject:
carbon; catalysts; chemical bonding; chemoselectivity; cobalt; ethylbenzene; green chemistry; hydrogen; ketones; oxidation; oxygen; pyrolysis; shrinkage; surface area; temperature; volatilization; zinc
Abstract:
... Highly dispersed Co sites in highly porous N-doped carbon (Co-NC) were synthesized by high-temperature pyrolysis of Zn/Co bimetallic zeolitic imidazolate framework-8 (CoₓZn₁₀₀₋ₓ-ZIF). Wide characterization indicated that the pyrolysis atmosphere and temperature play crucial roles in the metal dispersion and pore structure of the resulting materials. A hydrogen treatment at elevated temperatures is ...
DOI:
10.1039/c8gc03653e

6. Catalytic properties of intermetallic platinum-tin nanoparticles with non-stoichiometric compositions

Author:
Goh, Tian Wei,   et al.   ; Pei, Yuchen; Zhang, Biying; Maligal-Ganesh, Raghu V.; Naik, Pranjali J.; MacMurdo, Heather L.; Qi, Zhiyuan; Chen, Minda; Behera, Ranjan K.; Slowing, Igor I.; Huang, Wenyu;     Show all 11 Authors
Source:
Journal of catalysis 2019 v.374 pp. 136-142
ISSN:
0021-9517
Subject:
acetylene; alloys; catalysts; catalytic activity; furfural; hydrogenation; industrial applications; models; nanoparticles; stoichiometry; temperature
Abstract:
... Intermetallic compounds are unique catalyst platforms for mechanistic studies and industrial applications, because of their ordered structures in comparison to random alloys. Despite the intrinsically defined stoichiometry of intermetallic compounds, compositional deviations can still occur in intermetallic catalysts. The location of the extra metal atoms could differ the catalytic properties of i ...
DOI:
10.1016/j.jcat.2019.04.013

7. Allylic oxidation of olefins with a manganese-based metal–organic framework

Author:
Goh, Tian Wei,   et al.   ; Chen, Jingwen; Chen, Minda; Zhang, Biying; Nie, Renfeng; Huang, Ao; Volkov, Alexander; Zhang, Zhiguo; Ren, Qilong; Huang, Wenyu;     Show all 10 Authors
Source:
Green chemistry 2019 v.21 no.13 pp. 3629-3636
ISSN:
1463-9270
Subject:
catalysts; catalytic activity; cost effectiveness; cyclohexanones; cyclohexenes; green chemistry; ligands; manganese; oxidants; oxidation; oxygen
Abstract:
... Selective oxidation of olefins to α,β-unsaturated ketones under mild reaction conditions has attracted considerable interest, since α,β-unsaturated ketones can serve as synthetic precursors for various downstream chemical products. The major inherent challenges with this chemical oxidation are chemo- and regio-selectivity as well as environmental concerns, i.e. catalyst recycle, safety and cost. U ...
DOI:
10.1039/c9gc01337g

8. Self-Regulated Porosity and Reactivity in Mesoporous Heterogeneous Catalysts Using Colloidal Nanocrystals

Author:
Goh, Tian Wei,   et al.   ; Tian, Xinchun; VandenBerg, Oliver; VanDerslice, Jeremy; da Silva, Tiago Fiorini; Naab, Fabian; Hay, Jennifer L.; Chang, Julia J.; Yuan, Bin; Peiris, Frank C.; Huang, Wenyu; Cademartiri, Ludovico;     Show all 12 Authors
Source:
Journal of physical chemistry 2019 v.123 no.30 pp. 18410-18416
ISSN:
1932-7455
Subject:
adsorption; catalysts; catalytic activity; energy; hardness; ligands; mechanical properties; models; nanocrystals; nanorods; porosity; porous media
Abstract:
... This paper describes the creation of mesoporous inorganic films based on the plasma processing of ligand-capped nanocrystals. We use nanorods of HfO₂ as a model system and report an extensive characterization of the chemistry, structure, mechanical properties, and reactivity to show that (i) the aspect ratio of the nanorods regulates the pore size and pore volume of the films in a predictable mann ...
DOI:
10.1021/acs.jpcc.9b03723