质子交换膜燃料电池新型抗CO阳极结构  

Novel proton exchange membrane fuel cell anode configuration with enhanced CO tolerance

作　　者：石伟玉[1] 衣宝廉[1] 侯明[1] 景粉宁[1] 傅杰[1] 付宇[1] 明平文[1] 

机构地区：[1]中国科学院大连化学物理研究所燃料电池工程中心

出　　处：《电源技术》2007年第2期113-115,119,共4页Chinese Journal of Power Sources

基　　金：国家"863"计划资助项目(2005AA501660);国家自然科学基金资助项目(20206030)

摘　　要：质子交换膜燃料电池(PEMFC)广泛采用重整气为燃料,其存在的主要问题是重整气中含有一定浓度的CO(5×10-5～10-2),CO在Pt表面具有强烈的吸附作用,使电催化剂“中毒”。通过对提高质子交换膜燃料电池抗CO问题进行研究,在阳极扩散层流场侧担载催化剂(Pt、PtRu)的方法对电极进行修饰,在注入较少量氧化剂(体积百分比为2%的空气)的条件下使电池抗CO性能显著增强,且可以避免电极局部温度过高及可能带来的安全性问题。Proton exchange membrane fuel cells use reforming gas as fuel widely, which always may contain certain amount of carbon monoxide（5 × 10^-5-10^-2）. CO can strongly adsorb on the Pt catalyst surface and cause consider-able cell performance losses. In order to improve PEMFC CO tolerance, a novel PEMFC anode configuration was proposed. A layer of catalyst was placed on the gas diffusion layer, close to the anode flow field. With a small amount of air （2%） injection, this novel anode configuration can enhance PEMFC CO tolerance, and avoid local high temperature that may damage fuel cell membranes and reduce life.

关 键 词：质子交换膜燃料电池 阳极 催化剂 抗CO性能 

分 类 号：TM911.48[电气工程—电力电子与电力传动]