物理化学学报 >> 2003, Vol. 19 >> Issue (04): 342-346.doi: 10.3866/PKU.WHXB20030413

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PEMFC催化剂的研究：自制Pt/C电催化剂的性质

李莉;王恒秀;徐柏庆;李晋鲁;邢魏;毛宗强   

  1. 清华大学化学系一碳化学与化工国家重点实验室，北京　100084;中国科学院长春应用化学研究所，长春　130022;清华大学核能技术设计研究院，北京　100084
  • 收稿日期:2002-08-29 修回日期:2002-11-11 发布日期:2003-04-15
  • 通讯作者: 徐柏庆 E-mail:bqxu@mail.tsinghua.edu.cn

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

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摘要： 研究了一种用于质子交换膜燃料电池(PEMFC)的自制Pt/C电催化剂(标记为THYT-1)的物理化学和电化学性质.将THYT-1电催化剂与E-TEK公司的同类电催化剂的组成、形态及电催化性能进行了比较.单电池测试结果显示, THYT-1的电催化性能优于E-TEK电催化剂. CV测试结果表明CO在这两种电催化剂上的电氧化性能相近；TEM分析表明两种催化剂上Pt晶粒在炭载体上呈均匀分布，平均粒径均为2～3 nm； XPS和XRD测试结果表明两种催化剂中Pt主要以金属态存在.这些数据表明THYT-1催化剂的物理化学性质与E-TEK公司的相类似.

关键词: 质子交换膜燃料电池(PEMFC), 电极催化剂, Pt/C, CO电氧化, 纳米Pt催化剂

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