碳载体不同预处理方法对Pt/C电催化氧化甲醇性能的影响  

Effect of pretreatment method on carbon support and catalytic activity of Pt/C catalyst for methanol electro-oxidation

作　　者：胥诚成[1] 陈金伟[1] 王刚[1] 顾佳林[1] 高子辰[1] 王瑞林[1] 

机构地区：[1]四川大学材料科学与工程学院,四川成都610064

出　　处：《化学研究与应用》2013年第7期1025-1029,共5页Chemical Research and Application

基　　金：高等学校博士学科点专项科研基金(20110181110003);成都市科技局攻关计划(10GGYB380GX-023;10GGYB828GX-023);中物院-川大联合创新基金(XTCX2011001)

摘　　要：本文分别用混酸水热法(HT)和混酸冷凝回流法(RF)对Vulcan XC-72R碳黑进行预处理,并进一步研究其作为Pt/C催化剂载体的性能。循环伏安实验发现,采用HT法、RF法和未预处理的碳黑作为载体的Pt/C催化剂电催化甲醇氧化的比质量活性(正扫峰电流)分别为1055、704和395 mA/mgpt,即采用HT法预处理碳载体的Pt/C催化剂具有最高的电催化活性,而且计时电流实验也表现出最好的稳定性。实验结果表明,碳载体的预处理方法对制得的Pt/C催化剂的性能具有关键性的影响,且水热法是一种效果较好的预处理碳载体的方法。Carbon black（Vulcan XC-72R）used as supports for Pt/C catalyst were pretreated through hydrothermal method and re- flux condensation by mixing acid, then its performances were studied. The CV experiments showed that the specific electrochemical activity of Pt/C to the electro-oxidation methanol reached to 1055,704 and 395 mA/mg respectively when carbon black were treated by HT,RF methods and untreated（positive peak current）. The results indicated that Pt/C catalyst which carbon black were treated by HT method has the best electro-catalytic activity, and CA experiments showed it also has the best stability in all of them. It is clear that pretreatment on carbon black has a critical impact on performance for Pt/C catalyst, and HT method is a better pretreat- ment method of＂ carbon carrier.

关 键 词：直接甲醇燃料电池 铂 碳黑 水热法 电氧化 

分 类 号：O612.4[理学—无机化学]