PEMFC碳载体抗腐蚀能力研究  

Study of carbon support corrosion in PEMFC

作　　者：申强[1,2] 侯明[1] 邵志刚[1] 衣宝廉[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,辽宁大连116023 [2]中国科学院研究生院,北京100049

出　　处：《电源技术》2011年第1期43-46,共4页Chinese Journal of Power Sources

基　　金：国家“863”计划(2007AA05Z127);国家自然科学基金项目(20876155,20936008)

摘　　要：催化剂碳载体的腐蚀会引起催化剂衰减,最终导致PEMFC电池性能下降。在三电极体系中采用动电势扫描和恒电势氧化的方法对XC72、MWNT和石墨化XC72三种碳载体的抗腐蚀能力进行了研究。实验结果表明在三种载体中,石墨化XC72具有最优的抗腐蚀能力,MWNT其次,XC72的抗腐蚀能力最差。试验分析了温度的升高对载体腐蚀的促进作用,其中对XC72腐蚀的促进作用最大,对石墨化XC72腐蚀的促进作用最小。通过对Pt/XC72、Pt/MWNT和Pt/石墨化XC72抗腐蚀能力的研究发现,Pt的加入对载体腐蚀具有明显的促进作用,增大了载体的腐蚀电流。实验结果表明,Pt/石墨化XC72的抗腐蚀能力最优,Pt/MWNT其次,Pt/XC72抗腐蚀能力最差。Carbon support corrosion would lead to the degradation of catalyst and further the decrease of PEMFC performance.In this paper,the corrosion behaviors of XC72,MWNT and graphitic XC72 were studied by potentiodynamic and chronoamperometric methods.The results show that,graphitic XC72 has the best corrosion resistant ability,then MWNT,and the last is XC72.The temperature has a very big influence on support corrosion.With the increase of temperature,the support corrosion current increases,and the corrosion current of XC72 increases faster than MWNT and graphitic XC72.Pt also influences support corrosion significantly.After the loading of Pt on support,the support corrosion is promoted.Pt/Graphitic XC72 is shown to have the best corrosion resistant ability,then Pt/MWNT,and the last is Pt/XC72.

关 键 词：燃料电池 XC72 MWNT 石墨化XC72 碳腐蚀 

分 类 号：TM911[电气工程—电力电子与电力传动]