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대한화학회 제124회 학술발표회 및 총회 S-doping in IrOx as a Stability Enhancement Factor for Oxygen Evolution Reaction

등록일
2019년 8월 22일 16시 03분 34초
접수번호
1387
발표코드
INOR.O-6 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 09시 : 50분
발표형식
구두발표
발표분야
Inorganic Chemistry - Oral Presentation of Young Inorganic Chemistry
저자 및
공동저자
Jun Kim, Kwangyeol Lee*
Department of Chemistry, Korea University, Korea
Clean and efficient hydrogen production is expected to be in demand in the near future to secure environment-friendly resources of energy. Among various methods, water electrolysis is considered viable with appropriate catalysts to drive the two key reactions, namely, hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In particular, due to the sluggish kinetics of OER, developing highly efficient and durable electrocatalysts for OER is essential and iridium oxide has been the benchmark owing to its intrinsically excellent catalytic activity. Despite its low natural abundance and high cost, researches for Ir-based electrocatalysts have been consistently reported to improve the efficiency of Ir. However, the deterioration of OER performance for a prolonged operation under harsh OER condition has remained as a formidable challenge until recently. Therefore, it is utterly necessary to develop strategies to secure the desired catalysts stability under electrochemical operation. We have found that in situ S doping in IrOx leads to the enhanced catalyst stability toward OER under acidic media, and I will discuss in detail the unusual S-doping induced stabilization of the IrOx.
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