用于质子交换膜燃料电池抗CO的Pt-CeO_2/C催化剂的制备和表征  

Preparation and Characterization of CO Tolerance Pt-CeO_2/C Catalyst for Proton Exchange Membrane Fuel Cells

作　　者：张海艳[1,2] 林瑞[1,3] 曹春晖[1,3] 马建新[1,2,3] 

机构地区：[1]同济大学新能源汽车工程中心,上海201804 [2]华东理工大学资源与环境工程学院,上海200237 [3]同济大学汽车学院,上海201804

出　　处：《催化学报》2011年第4期606-611,共6页

基　　金：教育部新教师基金(20070247055);节能与环保汽车创新引智基地"111计划"(B08019);同济大学青年优秀人才基金(2006KJ022);上海市重点学科建设项目(B303)~~

摘　　要：采用一步沉淀法,制备了纳米级Pt-CeO2/C电催化剂.透射电镜和X射线衍射表征结果表明,制备的催化剂Pt颗粒均匀分散于碳载体表面,其粒径主要分布于1.5～2.5nm.将Pt-CeO2/C催化剂制备成质子交换膜燃料电池膜电极,经循环伏安和单电池极化曲线测试发现,Pt-CeO2/C催化剂性能与Pt/C催化剂的相当.一氧化碳消除伏安测试和单电池的抗一氧化碳性能测试结果表明,Pt-CeO2/C催化剂具有很好的抗一氧化碳氧化性能.The nano-scale Pt-CeO2/C catalyst was prepared by the co-precipitation method.The results of transmission electron microscopy and X-ray diffraction analysis show that the average size of Pt-CeO2/C noble metal particles （1.5～2.5 nm） is highly dispersed on the carbon supports.Pt-CeO2/C and a commercial Pt/C catalyst from Johnson Matthey Company were investigated by cyclic voltammetry and CO-stripping experiment.The cyclic voltammetry test shows that the Pt-CeO2/C catalyst has similar electrochemical surface area to Pt/C,which indicates that the home-made Pt-CeO2/C catalyst has high electrocatalytic activity for hydrogen oxidation.From the CO-stripping experiment,the Pt-CeO2/C catalyst showed very high CO tolerant activity compared to the Pt/C catalyst.We also fabricated the membrane electrode assembly with Pt-CeO2/C or Pt/C catalyst on the anode （the cathode also used the Pt/C catalyst） and found that Pt-CeO2/C catalyst showed higher performance than Pt/C catalyst.A tentative mechanism was proposed for a possible role of Ce as a co-catalyst in the Pt/C system for CO electrooxidation.

关 键 词：质子交换膜燃料电池 抗一氧化碳中毒 铂 二氧化铈 电化学比表面积 一氧化碳消除伏安测试 

分 类 号：TM911.4[电气工程—电力电子与电力传动]