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

제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 NiFe OER catalytic reaction study using in situ Sum-frequency generation spectroscopy

2019년 8월 30일 14시 05분 00초
PHYS.P-226 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 17일 (목요일) 11:00~12:30
Physical Chemistry
저자 및
Donghwan Kim, Kyungwon Kwak1,*, Minhaeng Cho1,*
Department of Chemistry, Korea University, Korea, CMSD, IBS-Korea University, Korea, Korea
1Department of Chemistry, Korea University, Korea
Water oxidation is an essential reaction for energy storage such as forming of hydrogen or hydrocarbons without accumulation of by-product. Unfortunately, This reaction is consist of a complex multistep, which adds a considerably large overpotential to the actual process. Although many studies have been conducted on OER catalysts with low overpotential and high stability, the specific catalytic reaction mechanism has not yet been elucidated. Among them, NiFe catalysts, which form layered double hydroxide (LDH) structures by potential, show excellent performance in alkaline conditions. The performance of the catalyst varies depending on the distance between the layers and the ratio of Ni and Fe. To understand this catalytic tendency and mechanism, it is important to use surface/interface selective spectroscopic method. Here, using vibrational sum-frequency generation (VSFG) spectroscopy, we selectively identified graphene electrode-electrolyte interfacial molecules. And we designed spectro-electrochemical (SEC) cell for in situ SFG experiment. In this work, using nonlinear spectroscopic method, we can observe that the hydrogen bonding network of the interfacial water molecules changes at each potential.