无机材料学报

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碳纳米管沉积铂和钌对PEMFC抗CO中毒能力的影响

李延辉1; 陈军峰1; 丁俊1; 毛宗强2; 徐才录1; 吴德海1   

  1. 1. 清华大学机械工程系; 2. 清华大学核能技术设计研究院, 北京 100084
  • 收稿日期:2003-05-09 修回日期:2003-06-09 出版日期:2004-05-20 网络出版日期:2004-05-20

Effect of Pt/Ru Supported by Carbon Nanotubes on the Ability of PEMFC to Resist CO Poisoning

LI Yan-Hui1; CHEN Jun-Feng1; DING Jun1; MAO Zong-Qiang2; XU Cai-Lu1; WU De-Hai1   

  1. 1.Department of Mechanical Engineering; 2. Institute of Nuclear Energy Technology; Tsinghua University; Beijing 100084; China
  • Received:2003-05-09 Revised:2003-06-09 Published:2004-05-20 Online:2004-05-20

摘要: 通过催化裂解法制备了碳纳米管,对其进行氧化处理后,在其表面沉积了分布均匀、尺寸呈纳米级的铂和铂/钌颗粒.实验结果表明,当采用碳纳米管沉积铂为催化剂时,质子交换膜燃料电池的催化剂铂很容易受CO的毒化而失去活性,从而使电池的电压随电流密度的降低而迅速降低;当采用碳纳米管沉积铂/钌为催化剂时,钌能够使铂表面吸附的CO被氧化为CO2,增加催化剂对CO的抵抗能力,使燃料电池的性能提高.

关键词: 碳纳米管, 铂, 钌, 质子交换膜燃料电池

Abstract: Carbon nanotubes prepared by a catalytic pyrolysis method were oxidized and homogeneously deposited with Pt and
Pt/Ru nanoparticles on their surfaces. The experimental results show that the catalysts of Pt deposited on carbon nanotubes of the proton exchange
membrane fuel cell are easily poisoned by CO and lose their activity, which make the fuel cell voltage decrease sharply with decreasing of
current density. But their ability to resist CO poisoning improves when Pt/Ru deposited on carbon nanotubes as catalysts, this
suggests that Ru can oxidize CO adsorbed on the surfaces of Pt into CO2, so the catalyst ability to resist CO poisoning increases.

Key words: carbon nanotubes, platinum, ruthenium, proton exchange membrane fuel cell

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