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  • 02월 28일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Composition-Dependent Electrocatalytic Activity of Cobalt Sulfides for Triiodide Reduction in Dye-Sensitized Solar Cells

등록일
2019년 2월 13일 10시 44분 10초
접수번호
4037
발표코드
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발표시간
목 09시 : 10분
발표형식
구두발표
발표분야
Electrochemistry - Oral Presentation of Young Scholars in Electrochemistry
저자 및
공동저자
Minsoo Kim, Jin Ho Bang*
Department of Bionano Technology, Hanyang University, Korea
A new nanoarchitecture of cobalt sulfide (CoSx) is designed by exploiting a Prussian blue analogue. Depending on the sulfidation temperatures, CoSx materials with different compositions and morphologies are obtained. This investigation of the composition-dependent electrocatalytic activity of CoSx for triiodide reduction reaction (IRR) reveals that sulfur-deficient CoSx is more active than sulfur-rich CoSx. When utilized in dye-sensitized solar cells (DSSCs), sulfur-deficient CoSx with a hollow nanocube morphology outperforms platinum (Pt), showing great promise as a Pt alternative. This composition dependency on IRR is attributed to different surface characteristics and electrical properties that vary with CoSx composition. This work highlights the importance of understanding the surface properties of sulfide-based electrocatalysts that are intimately dictated by their compositions as part of a new design principle for a highly active electrocatalyst.

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