Pt-H_xWO_3复合电极的制备及其对氧还原的电催化  

Preparations of Composite Electrodes of Pt with H_xWO_3 and Catalytic Activity toward Oxygen Reduction Reaction

作　　者：郭盼盼[1] 黄幼菊[1] 杨红艳[1] 李伟[1] 张庆龙[1] 李伟善[1] 

机构地区：[1]华南师范大学化学与环境学院,广东广州510006

出　　处：《电化学》2008年第4期398-401,共4页Journal of Electrochemistry

基　　金：国家自然科学基金(20573039)资助

摘　　要：应用电位扫描法制备3种铂与氢钨青铜(HxWO3)的复合电极,即铂上沉积氢钨青铜(HxWO3/Pt),氢钨青铜上沉积铂(Pt/HxWO3)及铂和氢钨青铜共沉积(Pt-HxWO3).测试结果表明,氢钨青铜能显著提高铂电催化对氧还原的活性,其中以复合电极Pt/HxWO3的电催化活性最高,这可能是因为在玻碳基底上先电沉积氢钨青铜再电沉积铂增加了铂的有效比表面,该电极制备为减少铂用量提供一条有效途径.Three composite electrodes of platinum with hydrogen tungsten bronze （Hx WO3 ）were prepared by voltammetry： hydrogen tungsten bronze deposited on platinum （HxWO3/Pt） ;platinum deposited on hydrogen tungsten bronze （ Pt/HxWO3 ） and codeposited platinum and hydrogen tungsten bronze （ Pt-HxWO3 ）. The eletro- catalytic activities of three electrodes toward oxygen reduction reaction were studied. It is found that the catalytic activity of platinum can be improved by introducing with hydrogen tungsten bronze. Among these composite electrodes Pt/HxWO3, and the electrode shows the best eletro-catalytic activity toward oxygen reduction reaction, hence, provides a new way for reducing loading of noble metal in the application for fuel cell.

关 键 词：氧还原 催化 氢钨青铜 铂 复合 

分 类 号：O646.54[理学—物理化学]