磷钼酸修饰炭载Pd电极的H_2O_2电催化还原  

Study on Carbon Supported Pd Catalysts Modified by Phosphomolybdic Acid for H_2O_2 Electrocatalytic Reduction

作　　者：孙丽美[1] 张铖[1] 包英荣[1] 李宏霞[1] 

机构地区：[1]内蒙古民族大学化学化工学院,内蒙古通辽028000

出　　处：《电化学》2014年第1期56-59,共4页Journal of Electrochemistry

基　　金：国家自然科学基金项目(No.21003070);内蒙古自治区自然科学基金项目(No.2012MS0208)资助

摘　　要：采用化学还原法制备了炭载钯(Pd/C)催化剂,浸渍修饰磷钼酸(PMA)制备成复合催化剂.通过XRD和红外谱图(IR)表征催化剂的组分和结构,采用线性扫描曲线及计时电流曲线考察了该电极的电催化性能.研究表明,室温(20oC)PMA-Pd/C电极的H2O2还原电催化活性更优.The Pd/C catalyst was prepared with the chemical reduction method, and phosphomolybdic acid （PMA） was modified on the Pd/C catalyst using the dipping method. The compositions and structures of the Pd/C and Pd/C modified by phosphomolybdic acid （PMA-Pd/C） catalysts were characterized with X-ray diffraction and Fourier Transform infrared spectroscopy analyses. The electrocatalytic activity and stability of the catalysts for the reduction of hydrogen peroxide （H202） were studied using cyclic voltammetry and chronoamperometry. The results showed that the phosphomolybdic acid was tightly fixed on the surface of Pd/C catalyst through the chemical interaction. The eletrocatalytic activity of the PMA-Pd/C on H202 reduction is higher than that of the Pd/C catalyst.

关 键 词：磷钼酸 炭载钯催化剂 H2O2电还原 燃料电池 

分 类 号：O646.54[理学—物理化学]