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Received September 5, 2008
Accepted October 24, 2008
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MgO를 이용한 다공성 탄소 섬유 제조 및 이를 이용한 연료전지용 촉매 특성
Preparation of Porous Carbon Fiber by Using MgO Powder and Its Characteristics of Catalysts for Fuel Cell
1한국에너지기술연구원 신연료전지센터, 305-343 대전시 유성구 장동 71-2 2과학기술연합대학원대학교 신에너지기술, 305-333 대전시 유성구 과학로 113
1Advanced Fuel Cell Research Center, Korea Institute of Energy Research, 71-2, Jang-dong, Yuseong-gu, Daejeon 305-343, Korea 2Advanced Energy Technology, University of Science & Technology, 113, Gwahangno, Yuseong-gu, Daejeon 305-333, Korea
doohwan@kier.re.kr
Korean Chemical Engineering Research, December 2008, 46(6), 1142-1147(6), NONE Epub 29 December 2008
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Abstract
Nano-MgO와 메조페이스 피치로부터 복합 탄소섬유를 만들고 MgO를 제거함으로써 직접 메탄올 연료전지용 촉매담지체로서의 다공성 탄소섬유를 제조하였다. 이 다공성 탄소섬유의 비표면적은 8~58 cm2/g이고, 표면기공구조는 마이크로기공이 거의 없이 MgO 입자크기 유래의 메조기공(10~15 nm)으로 구성된 것이 특징이며, MgO 혼입량(1~10 wt%)에 따라 조절할 수 있었다. 본 다공성 탄소섬유를 담지체로 이용하여 함침법으로 60 wt% Pt-Ru 촉매를 담지하였으며, 제조된 Pt-Ru 촉매의 메탄올 산화 특성 및 단위전지 성능 측정 결과 상용촉매에 비하여 5~10% 이상 향상된 값을 나타내었다.
Nano-structured porous carbon fiber(PCF) for the catalyst supports of the direct methanol fuel cell_x000D_
(DMFC) were prepared from the mesophase pitch by using the nano-MgO powders. Specific surface area of the PCFs was 8~58 m2/g and surface pore structures had almost meso pore diameter of 10~20 nm which were depending on the amount of MgO spheres. Aqueous reduction method was used to load 60 wt% PtRu on the prepared PCF supports. The electro-oxidation activity and single cell performance of the 60 wt% Pt-Ru catalysts were measured by cyclic voltammetry and unit cell test. The performances of these catalysts increased by 5~10% compared with one of commercial catalyst.
Keywords
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Cattaneo C, de Pinto MIS, Mishima H, de Mishima BAL, Lescano D, Cornaglia L, J. Electroanal. Chem., 461(1-2), 32 (1999)
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