globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2020.01.015
论文题名:
Importance of Au nanostructures in CO2 electrochemical reduction reaction
作者: Yang D.-R.; Liu L.; Zhang Q.; Shi Y.; Zhou Y.; Liu C.; Wang F.-B.; Xia X.-H.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期:10
起始页码: 796
结束页码: 802
语种: 英语
中文关键词: CO2 reduction reaction (CO2RR) ; Electrocatalysis ; Gold nanostructures ; Morphological effect ; Size effect
英文关键词: Carbon dioxide ; Electrocatalysis ; Electrolytic reduction ; Greenhouse effect ; Hydrogen ; Hydrogen evolution reaction ; Nanocatalysts ; Nanostructures ; Particle size ; Particle size analysis ; Reaction kinetics ; Sols ; CO2 reduction ; Electrochemical conversion ; Electrochemical reductions ; Faradaic efficiencies ; Gold nanostructures ; Morphological effects ; Particle size effect ; Size effects ; Gold
英文摘要: Electrochemical conversion of CO2 into fuels is a promising means to solve greenhouse effect and recycle chemical energy. However, the CO2 reduction reaction (CO2RR) is limited by the high overpotential, slow kinetics and the accompanied side reaction of hydrogen evolution reaction. Au nanocatalysts exhibit high activity and selectivity toward the reduction of CO2 into CO. Here, we explore the Faradaic efficiency (FE) of CO2RR catalyzed by 50 nm gold colloid and trisoctahedron. It is found that the maximum FE for CO formation on Au trisoctahedron reaches 88.80% at −0.6 V, which is 1.5 times as high as that on Au colloids (59.04% at −0.7 V). The particle-size effect of Au trisoctahedron has also been investigated, showing that the FE for CO decreases almost linearly to 62.13% when the particle diameter increases to 100 nm. The X-ray diffraction characterizations together with the computational hydrogen electrode (CHE) analyses reveal that the (2 2 1) facets on Au trisoctahedron are more feasible than the (1 1 1) facets on Au colloids in stabilizing the critical intermediate COOH*, which are responsible for the higher FE and lower overpotential observed on Au trisoctahedron. © 2020 Science China Press
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170110
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作者单位: State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China; Key Laboratory of Mesoscopic Chemistry of MOE, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China

Recommended Citation:
Yang D.-R.,Liu L.,Zhang Q.,et al. Importance of Au nanostructures in CO2 electrochemical reduction reaction[J]. Science Bulletin,2020-01-01,65(10)
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