Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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Improvement of Catalyst Supporting Characteristic on MWCNTs with Different Thermal Treatment for PEMFC

탄소나노튜브의 열처리에 따른 고분자전해질연료전지용 촉매의 표면처리 및 담지특성 향상

  • Kwon, Min-Kii (School of Chemical Engineering & Bioengineering, University of Ulsan) ;
  • Jung, Ju-Hae (School of Chemical Engineering & Bioengineering, University of Ulsan) ;
  • Kim, Jun-Bom (School of Chemical Engineering & Bioengineering, University of Ulsan)
  • 권민기 (울산대학교 생명화학공학부) ;
  • 정주해 (울산대학교 생명화학공학부) ;
  • 김준범 (울산대학교 생명화학공학부)
  • Received : 2011.11.17
  • Accepted : 2011.11.28
  • Published : 2011.11.30
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Abstract

In this study, carbon nanotubes were used as supporter to get high dispersion and high loading of Pt for PEMFC. Thermal oxidation method was applied to carbon nanotubes surface treatment. FT-IR and XPS were used to measure the effect of temperature on functional group. The increased concentration of functional groups was confirmed by XPS analysis, and increased Pt loading and dispersion was also observed by TGA and TEM analysis with increased temperature. Thermal behavior of oxidation is closely related to the manufacture of highly dispersed Pt/MWCNTs. Pt/MWCNTs treatment temperature at $90^{\circ}C$, showed high dispersion and high loading of Pt, and also showed good cell performance.

본 연구에서는 탄소나노튜브를 담지체로 사용하여 연료전지용 백금(Pt) 촉매의 고분산, 고담지를 목적으로 하였다. 탄소나노튜브의 표면처리는 열적산화방식으로 전처리하였다. 25, 50, 90 및 $110^{\circ}C$에서 열처리를 하였을 경우, 온도변화에 따른 작용기의 영향을 FT-IR, XPS를 통해 분석하였다. XPS를 통해 전처리의 온도가 증가할수록 작용기의 농도가 증가하는 것을 확인 하였으며, TGA와 TEM을 통해 Pt의 담지량과 분산도 또한 증가한 것을 확인하였다. 산화과정에서 열적거동은 고담지 Pt 촉매의 제조와 밀접한 관련이 있으며, 본 연구에서 제조된 촉매의 고분산, 고담지에 적절한 합성 온도는 $90^{\circ}C$로 관찰되었으며 단위전지에서 가장 좋은 성능을 나타내었다.

Keywords

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