催化学报 ›› 2007, Vol. 28 ›› Issue (2): 109-111.

• 研究论文 • 上一篇    下一篇

碳化钨用作质子交换膜燃料电池催化剂载体的抗氧化性能

张生生1,2,朱红1,2,俞红梅2,侯俊波2,衣宝廉2,明平文2   

  1. 1 北京交通大学理学院, 北京 100044; 2 中国科学院大连化学物理研究所, 辽宁大连 116023
  • 收稿日期:2007-02-25 出版日期:2007-02-25 发布日期:2011-01-28

The Oxidation Resistance of Tungsten Carbide as Catalyst Support for Proton Exchange Membrane Fuel Cells

ZHANG Shengsheng1,2, ZHU Hong1,2*, YU Hongmei2, HOU Junbo2, YI Baolian2, MING Pingwen2   

  1. 1 School of Science, Beijing Jiao Tong University, Beijing 100044, China; 2 Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2007-02-25 Online:2007-02-25 Published:2011-01-28

摘要: 采用还原碳化法制备了碳化钨样品,并用原位还原法担载Pt粒子得到Pt/WxCy催化剂. 利用计时电流技术对Pt/WxCy和常规Pt/C催化剂进行氧化处理,并用循环伏安法测试了氧化前后两种催化剂的电化学活性面积. 将两种催化剂制成单电池,对比研究了其氧化后的性能衰减. 结果表明, Pt/WxCy催化剂制成的单电池抗氧化能力显著高于普通Pt/C制成的单电池.

关键词: 碳化钨, 碳, 催化剂载体, 铂, 燃料电池, 抗氧化性能

Abstract: Electrochemical oxidation of carbon supports for Pt/C catalysts can cause degradation of proton exchange membrane fuel cells (PEMFCs). To improve the oxidation resistance of the catalyst supports, tungsten carbide (WxCy) was investigated as a substitute for carbon supports in PEMFCs. The Pt/C and Pt/WxCy samples were oxidized using the chronoamperometry method. The electrochemical active area of the two samples was measured using cyclic voltammetry. Furthermore, the Pt/C and Pt/WxCy catalysts were applied to single cells to compare their performance degradation after oxidation. As a result, the single cell prepared with Pt/WxCy catalyst showed higher oxidation resistance than the contrastive cell prepared with Pt/C catalyst.

Key words: tungsten carbide, carbon, catalyst support, platinum, fuel cell, oxidation resistance