Oxygen Reduction of PAFC Gas Diffusion Electrode with Various Pt Impregnation Methods

인산형 연료전지용 기체확산전극의 백금촉매 담지방법에 따른 산소환원 특성

  • 유덕영 (한양대학교 공과대학 공업화학과) ;
  • 은영찬 (한양대학교 공과대학 공업화학과) ;
  • 심중표 (한양대학교 공과대학 공업화학과) ;
  • 이주성 (한양대학교 공과대학 공업화학과)
  • Received : 1996.07.27
  • Accepted : 1996.09.04
  • Published : 1996.10.10

Abstract

Pt catalyst on carbon black was prepared by colloidal method, ion exchanging method and methanol reducing method. The colloidal method has been used generally. At ion exchanging method, $H^+$ of functional group on carbon surface made by oxidation treatment was exchanged with Pt ion. At methanol reducing method, Pt was impregnated on carbon to reduce by methanol contained with surfactants. With TEM and XRD, Pt particle size impregnated on carbon by various methods was $30{\sim}50{\AA}$. Loading yield was about 100%, loading yield of ion exchanging method was 99.92% by DCP analysis and 99.87% by combustion method. Within 60 hour, current density of oxygen reduction was $460mA/cm^2$ at 0.7V(vs. RHE) at colloidal method. It was the better performance than catalyst prepared by ion exchanging, methanol reducing method. But, it was shown some decrease of performance for long operation time(after 100hour), catalyst prepared by methanol reducing method was shown stable performance.

Keywords

Acknowledgement

Supported by : 통상산업부

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