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| Type |
Poster Presentation |
| Area |
Inorganic Chemistry |
| Room No. |
Exhibition Hall 2 |
| Time |
4월 18일 (목요일) 11:00~12:30 |
| Code |
INOR.P-37 |
| Subject |
AuAg hollow nanocubes prepared by galvanic replacement as optimized electrocatalysts for direct electrochemical CO2 reduction |
| Authors |
Joon Woo Park, Hyunjoon Song*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
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| Abstract |
Since CO2 has been pointed out as the main cause of global warming, various efforts have been put in to reduce and convert CO2 into more useful products. Among catalysts that have been researched for CO2 coversion, Au and Ag as electrocatalysts have been widely studied for the direct electroconversion of CO2 to CO with high selectivity. Developing nanostructures for these noble metal catalysts are well known for their high surface area, alongside with the tunability of catalytic active sites. In this study, we present AuAg hollow nanocubes prepared from Ag nanocubes by a simple galvanic replacement reaction and their application to electrochemical CO2 reduction catalysis. This integration of Au results in a drastic increase of catalytic surface area which leads to high mass activity and cost efficiency. Also, the overpotential for CO production is significantly enhanced compared to Ag cubes which were the template for galvanic replacement. Variations of the Au to Ag ratio are further presented to determine the optimal nanostructure and elemental composition in catalysis, and the implications on general principles for designing CO2 reduction electrocatalysts are discussed. |
| E-mail |
joonwoo.p@kaist.ac.kr |
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123rd General Meeting of the KCS