Acta Phys. -Chim. Sin. ›› 2003, Vol. 19 ›› Issue (04): 342-346.doi: 10.3866/PKU.WHXB20030413

• ARTICLE • Previous Articles     Next Articles

Studies on PEMFC Electrocatalysts: Physicochemical Characterization of Homemade Pt/C Electrocatalyst

Li Li;Wang Heng-Xiu;Xu Bo-Qing;Li Jin-Lu;Xing Wei;Mao Zong-Qiang   

  1. State Key Laboratory of C1 Chemistry and Technology, Department of Chemistry, Tsinghua University, Beijing 100084;Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022;Institute of Nuclear Energy Technology, Tsinghua University, Beijing 100084
  • Received:2002-08-29 Revised:2002-11-11 Published:2003-04-15
  • Contact: Xu Bo-Qing E-mail:bqxu@mail.tsinghua.edu.cn

Abstract: A homemade Pt/C electrocatalyst(named as THYT-1) for proton-exchange membrane fuel cell(PEMFC) was prepared and characterized comprehensively. Single-cell measurements showed that the performance of THYT-1 for hydrogen electro-oxidation was superior to that of the E-TEK Pt/C catalyst. Cyclic voltammetry measurements in a half PEM fuel cell indicated that the electro-oxidation behavior of adsorbed CO on THYT-1 and the E-TEK Pt/C catalyst was indistinguishable. XPS and XRD detections showed that platinum of the two catalysts exist mainly in the metallic state. Uniformly dispersed Pt-particles with sizes of 2~3 nm were found to be the dominant images of Pt in the TEM micrographs for both THYT-1 and the E-TEK catalysts. Application of THYT-1 catalyst in the research and development of PEMFC technology can be expected.

Key words: Proton-exchange membrane fuel cell, Electrocatalyst, Pt/C, CO electro-oxidation, Nano-Pt catalyst