언론에 비친 KCS
후원사 혜택 안내
지면 광고 안내
공익법인 기부금 내역서
소개 및 활동/사업
역대 학회상 수상자
대한화학회 창립 75주년
현재 가능한 작업은 아래와 같습니다.
09월 10일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능
제124회 대한화학회 학술발표회, 총회 및 기기전시회
Mixed Copper States in Anodized Cu Electrocatalyst for Stable and Selective Ethylene Production from CO
2019년 9월 20일 11시 51분 01초
이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 10시 : 49분
Oral Presentation for 2019 DOW Korea Award
Si Young Lee
, Yun Jeong Hwang
Division of Energy and Environmental Technology, KIST School, Korea
Recently, in electrochemical CO
reduction studies, copper catalysts have been noted as major studies because they could form C-C bonds. To promote the formation of this C-C bond, researchers changed the shape of the copper catalyst surface to induce local pH changes, or to introduce copper oxide as a catalyst. However, in copper oxide-based catalysts not only complexly synthesizes the catalyst, it is not clear why the oxide catalyst shows better C-C coupling performance. Therefore, in this study, a simple anodization method was introduced to synthesize the catalyst in the Cu(OH)
state. This catalyst was distinguished from the Cu
O or CuO present in the traditional native oxide layer, and showed a 40% ethylene selectivity, which was twice as good as copper foil, stable for 40 hours. On the other hand, uniquely selectivity of CH
increased slightly over time in the long-term bulk electrolysis. This means that the C1/C2 generation ratio changes with changes in surface conditions of Cu(OH)
catalyst. Therefore, we introduced pre-treatment process, which is high negative potential reduction and low negative potential reduction to adjust the Cu
ratio of the surface. At this time we observed that while ethylene production was stable for a long time for samples with a high ratio of Cu
, samples with missing Cu
decreased ethylene production and increased methane production rapidly within hours. Not only could the cause of C-C bond formation of copper catalyst be identified through this study, it could present a new strategy to maintain stability in oxide-derived copper catalyst in the future.
등록된 그림이 있는경우 그림을 클릭하시면 원본 그림파일을 볼 수 있습니다.
최종본을 확인하지 않아 발생된 문제에 대해서는 책임지지 않습니다.
미리보기의 그림위치는 임시 위치입니다. 모든 그림파일은 Abstract 하단에 위치하게 됩니다.