Seminar

Seminar

Electron-Induced Reorganization of Coordination Complexes to Promote Electrocatalytic H2 Evolution and CO2 Reduction

  • POSTED DATE : 2022-11-03
  • WRITER : 화학과
  • HIT : 261
  • DATE : 2022년 11월 3일(목) 오후 4시 30분
  • PLACE : 330226호실

세미나가 이번 주 목요일(11월 3일) 오후 4시 30분에 개최됩니다.

많은 참여 부탁드립니다.


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제  목 : Electron-Induced Reorganization of Coordination Complexes to Promote Electrocatalytic H2 Evolution and CO2 Reduction

연  사 : 서준혁 교수(GIST)
일  시 : 2022년 11월 3일(목) 오후 4시 30분

장  소 : 화학관 2층 330226호실

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Electron-Induced Reorganization of Coordination Complexes to Promote Electrocatalytic H2 Evolution and CO2 Reduction

 

Junhyeok Seo

 

Department of Chemistry, GIST

Gwangju 61005, Republic of Korea

E-mail: seojh@gist.ac.kr

 

Abstract: Coordination complexes experience structural reorganizations along with electron transfers into the systems. The electron-induced reorganization would likely open a reaction site for substrates and provide a new reaction pathway in energy conversion and storage applications involving small molecules such as H2 or CO2. Polypyridyl complexes have shown abilities as electrocatalysts in H2 evolution reaction (HER) and CO2 reduction reaction (CO2RR). A proton-transfer process is a key step in determining the catalytic efficiency in the proton reduction reaction. On the other hand, individual electron and proton transfer steps should be controlled to enhance CO2RR selectively; otherwise, the thermodynamically favored HER will become dominant. In current examples, we synthesized NNN-Co-(bulky π-acceptor) complexes and could selectively dissociate Co–N (of tertiary amine donor) bond by initial two-electron transfers. The electron-induced structural reorganization led to a direct CO2 activation, and the subsequent proton transfer enhanced the CO2-to-CO conversion. In this talk, we will discuss the recent findings about the electron-induced reorganization of Co and Fe coordination complexes and the effect on the selective reactions toward protons and CO2.