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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

대한화학회 제121회 학술발표회 및 총회 Investigation of Surface Morphological Effects on the Electroreduction of CO2 over High Indexed Au Nanoparticles

2018년 2월 6일 13시 38분 23초
INOR.P-80 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
Joon Woo Park, Woong Choi, Hyunjoon Song*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
The increasing anthropogenic CO2 levels in the atmosphere and the depletion of fossil fuels calls for an effective method to transform CO2 molecules into useful products. To tackle this problem with direct electrocatalytic CO2 reduction, noble metal nanocatalysts have drawn interest due to their unique product selectivity towards CO. For a more systematique study, Au nanoparticles were selected as a model system to relate the surface structure of nanoparticles with catalytic properties for electrochemical CO2 reduction in aqueous conditions. Au icosaheral and Au nanostar nanoparticles were synthesized, where each were previously reported to have low-index and high-index facets respectively. Both types of nanoparticles were applied for electrochemical CO2 reduction to evaluate their catalytic activity and product selectivity. Au nanostars show both higher current density and CO selectivity than icosahedra, where overpotentials values were also significantly lowered. Mass activities of these Au nanoparticles are superior by a magnitude from previous reports with Au nanoparticles. Detailed mechanistic sutdies include the exact characterization of Au nanostars and electrolyte concentration variation, and the implications of these results are discussed.