Pt-ZrO_2/C催化剂对CO电氧化机理探讨  

Discuss on mechanism of CO electro-oxidation with Pt-ZrO_2/C catalyst

作　　者：李金峰[1] 邱新平[1] 

机构地区：[1]清华大学化学系有机光电子与分子工程教育部重点实验室,北京100084

出　　处：《电源技术》2007年第3期209-211,共3页Chinese Journal of Power Sources

摘　　要：采用传统的浸渍还原法制备了Pt-ZrO2/C[20% Pt-ZrO2(质量分数)]催化剂并研究了其对CO电氧化的催化活性。CO溶出实验结果表明:ZrO2的加入使吸附在催化剂表面的CO氧化电位向低电位方向移动,有利于提高催化剂的抗CO中毒能力。利用平均场模型和RO-PG模型对吸附在Pt-ZrO2/C电极表面的CO氧化机理进行了模拟,结果表明在Pt-ZrO2/C电极表面吸附的CO氧化遵从平均场模型。Pt-ZrO2/C catalyst was prepared and compared with Pt/vulcan XC-72 （20% Pt E-TEK） in terms of the electrochemical activity for CO oxidation by electrochemical techniques. The CO-stripping experiment results show that the addition of ZrO2 into Pt results in the negative shift of CO-stripping peak and improvement of the CO-tolerance ability of Pt/C catalyst. The mean field and RO-PG models were used to fit the chronoamperometry results of the CO oxidation with respect to Pt-ZrO2/C electrode.

关 键 词：CO 催化剂 Pt—ZrO2/C 直接甲醇燃料电池 

分 类 号：TM911.4[电气工程—电力电子与电力传动]