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| Type |
Poster Presentation |
| Area |
Electrochemistry |
| Room No. |
Exhibition Hall 2 |
| Time |
4월 18일 (목요일) 11:00~12:30 |
| Code |
ELEC.P-457 |
| Subject |
Thermally Induced Nanostructuring for the Synthesis of Core/Shell Structured CoO/CoSx Electrocatalyst |
| Authors |
Minsoo Kim, Jin Ho Bang*
Department of Bionano Technology, Hanyang University, Korea
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| Abstract |
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. |
| E-mail |
kmshorse@naver.com |
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123rd General Meeting of the KCS