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제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Thermally Induced Nanostructuring for the Synthesis of Core/Shell Structured CoO/CoSx Electrocatalyst

등록일
2019년 2월 13일 10시 45분 46초
접수번호
4039
발표코드
ELEC.P-457 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 18일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Electrochemistry
저자 및
공동저자
Minsoo Kim, Jin Ho Bang*
Department of Bionano Technology, Hanyang University, Korea
Typically, a high surface area of an electrocatalyst is required for a strong catalytic activity in dye-sensitized solar cells (DSSCs). For this reason, numerous bottom-up nanostructuring strategies were proposed to increase the surface area of cobalt compounds (CoOx, CoSx) as an alternative to platinum electrode. However, they are prone to structural collapse during sulfide treatment at high temperature. Therefore, a rational synthesis is needed to fully accommodate the porosity and the surface chemistries of the sulfide-treated cobalt compounds. In this work, we synthesized porous Core/Shell CoO/CoSx from solid sphere-shaped Co3O4 via simple two-step top-down method. Co3O4 is reduced in ammonia condition generating mesoporosity inside the particle from structure rearrangement. After that, CoSx shell is formed by sulfide thermal treatment while porous CoO core is maintained inside. This unique Core/Shell matrix enhances catalytic activity (from high surface area of CoO) and also makes faster charge transfer reaction (from CoSx) as a comparable electrocatalyst to platinum in DSSCs.

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