Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Preparation of Porous Carbon Fiber by Using MgO Powder and Its Characteristics of Catalysts for Fuel Cell

MgO를 이용한 다공성 탄소 섬유 제조 및 이를 이용한 연료전지용 촉매 특성

  • Nam, Kidon (Advanced Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Kim, Sang-Kyung (Advanced Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Lim, Seongyop (Advanced Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Peck, Donghyun (Advanced Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Lee, Byoungrok (Advanced Fuel Cell Research Center, Korea Institute of Energy Research) ;
  • Jung, Doohwan (Advanced Fuel Cell Research Center, Korea Institute of Energy Research)
  • 남기돈 (한국에너지기술연구원 신연료전지센터) ;
  • 김상경 (한국에너지기술연구원 신연료전지센터) ;
  • 임성엽 (한국에너지기술연구원 신연료전지센터) ;
  • 백동현 (한국에너지기술연구원 신연료전지센터) ;
  • 이병록 (한국에너지기술연구원 신연료전지센터) ;
  • 정두환 (한국에너지기술연구원 신연료전지센터)
  • Received : 2008.09.05
  • Accepted : 2008.10.24
  • Published : 2008.12.31
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Abstract

Nano-structured porous carbon fiber(PCF) for the catalyst supports of the direct methanol fuel cell (DMFC) were prepared from the mesophase pitch by using the nano-MgO powders. Specific surface area of the PCFs was $8{\sim}58m^2/g$ 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.

Nano-MgO와 메조페이스 피치로부터 복합 탄소섬유를 만들고 MgO를 제거함으로써 직접 메탄올 연료전지용 촉매 담지체로서의 다공성 탄소섬유를 제조하였다. 이 다공성 탄소섬유의 비표면적은 $8{\sim}58m^2/g$ 이고, 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

Keywords

Acknowledgement

Supported by : 지식경제부

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