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  • 09월 10일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Addition of Ultra-thin Au Layer underneath Mn oxide for Alkaline Oxygen Evolution Reaction

2019년 9월 9일 15시 43분 32초
ELEC.P-446 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 17일 (목요일) 11:00~12:30
저자 및
Kahyun Ham, Jaeyoung Lee*
School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Korea
The overpotential in the anode, happens oxygen evolution reaction (OER), contributes much more to the voltage drop during electrolysis than that in the cathode. Hence, substantial effort has continuously been devoted to finding the most effective catalyst metal/metal oxide for oxygen evolution reaction based on mainly Ni, Co, Fe and Mn in especially alkaline media OER. However, Mn showed lower activity compared to Co and Ni as the catalytic metal ion. During OER, four electrons are produced and they should be transferred for the facilitated reaction. Since Au is the highest electronegativity among metal, OER on Mn oxide on the Au layer can be enhanced by taking a produced electron from Mn to Au and maintaining Mn active oxidation state. In this study, we synthesized an ultra-thin Au layer on a carbon electrode via sputtering and loaded Mn oxide catalyst on the Au electrode. The thickness of the Au layer was controlled by the sputtering time and confirmed by cross-sectional scanning electron microscopy. We investigated the OER activity depending on the thickness of Au by electrochemical test and the role of Au layer by comparing electron structure of Au and Mn before and after OER test.