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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (22): 2554-2558. 上一篇    下一篇

研究论文

Pt纳米催化剂在质子交换膜燃料电池催化层中的尺寸效应研究

王爱丽1,陈胜利2   

  1. (a湖北省化学电源重点实验室 武汉大学化学与分子科学学院 武汉 430072) (b青海大学化工学院 西宁 810016)
  • 投稿日期:2008-12-17 修回日期:2009-05-19 发布日期:2009-07-14
  • 通讯作者: 陈胜利 E-mail:slchen@whu.edu.cn
  • 基金资助:

    自然科学基金重点项目(No. 50632050);教育部新世纪优秀人才资助计划（NECT-06-0612）

Particle Size Effects of Pt Nanocatalyst in the Catalyst Layer of Proton Exchange Membrane Fuel Cell

Wang, Aili a,b，Sun, Yua，Liang, Zhixiua，Chen, Shengli*,a   

  1. (a Hubei Electrochemical Power Sources Key Laboratory, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072) (b College of Chemical Engineering, Qinghai University, Xining 810016)
  • Received:2008-12-17 Revised:2009-05-19 Published:2009-07-14

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1814

被引次数

5

以XC-72碳黑为载体, H2[PtCl6]为前驱体, 采用浸渍还原法并结合后续高温处理, 制备出不同尺寸Pt颗粒(3～8 nm)的Pt/C催化剂. 在基于质子交换膜燃料电池(PEMFC)单电池的电化学电解池中, 对实际PEMFC催化层中燃料电池反应的Pt催化剂尺寸效应进行了研究. 结果表明, 在PEMFC催化层环境中, Pt/C纳米催化剂对氢氧化和氧还原反应均有显著的粒度尺寸效应. 随着Pt粒度减小, 氢氧化和氧还原反应的表面积活性均降低.

关键词: Pt/C催化剂, 浸渍法, 粒度效应, 质子交换膜燃料电池

Pt/C electrocatalysts with different Pt particle sizes (3～8 nm) were prepared using the impregnation-reduction method with H2[PtCl6] as precursor and vulcan XC-72 carbon black as support. The prepared Pt/C catalysts were used to evaluate the size effect of Pt on the kinetics of fuel cell reactions in the real catalyst layer of proton exchange membrane fuel cell (PEMFC) using a modified PEMFC single cell. The results indicate that the size of Pt nanocatalyst has significant impacts on the kinetics of hydrogen oxidation reaction (HOR) and oxygen reduction reaction (ORR) in the catalyst layer of PEMFC. With decreased Pt particle size, the specific activities of HOR and ORR decrease.

Key words: Pt/C catalyst, impregnation-reduction method, particle size effect, PEMFC