Pt-NbOx/C、Pt-ZrO_2/C复合氧电极催化剂的制备及性能研究  

Preparation and Performance of Pt-NbO_x/C、Pt-ZrO_2/C Composite Catalysts on Oxygen Electrodes

作　　者：孟庆虎[1] 张向军[1] 李伟伟[1] 卢世刚[1] 

机构地区：[1]北京有色金属研究总院,北京100088

出　　处：《有色金属（冶炼部分）》2010年第1期46-49,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家863计划资助项目(2007AA03Z245)

摘　　要：以NbOx、ZrO2作为助催化剂,采用分步法制备得到Pt-NbOx/C、Pt-ZrO2/C复合催化剂,采用XRD、SEM等手段分析了催化剂的物相及形貌特征。通过循环伏安法、阴极极化曲线等电化学方法对催化剂的电化学性能进行了研究。结果表明,Pt均匀分布在载体表面,颗粒大小均在5 nm以下;NbOx和ZrO2的加入没有改变氧的还原反应机理,与Pt/C、Pt-ZrO2/C催化剂相比,Pt-NbOx/C复合催化剂催化氧电化学还原过程的活性有了明显提高。Pt-NbOx/C and Pt-ZrO2/C were synthesized with NbOx and ZrO2 as assistant catalysts by two step method. The phase and morphology of the catalysts were investigated by XRD and SEM respectively. The character of electrochemistry of the catalysts were investigated by Cyclic Voltammetry and Linear Sweep Voltammetry. The results show that the sizes of Pt grains were less than 5nm and dispersed uniformly on the surface of carrier; the electrochemical reduction mechanism of oxygen was not changed when adding NbOx and ZrO2; Compared with Pt/C and Pt-ZrO2/C, the electrocatalystic activivity of Pt-NbOx/C was enhanced.

关 键 词：质子交换膜燃料电池 催化剂 助催化剂 NbOx ZRO2 

分 类 号：TM911.4[电气工程—电力电子与电力传动]