Pt-TiO_2-La_2O_3/石墨电极对CO氧化的电催化作用  

Electrocatalytic performance of the Pt-La_2O_3-TiO_2/graphite electrode for the oxidation of carbon monoxide

作　　者：苏育才[1] 童庆松[1] 施继成[1] 

机构地区：[1]福建师范大学化学材料科学院,福建福州350007

出　　处：《吉林化工学院学报》2007年第1期17-20,共4页Journal of Jilin Institute of Chemical Technology

基　　金：教育部重点项目(03065;JA02159);福建省自然科学基金资助项目(E0510014);福建省科技厅资助项目(2005L012)

摘　　要：采用溶胶-凝胶法制备了Pt-La2O3-TiO2/石墨电极.通过循环伏安法、XRD衍射和扫描电镜等现代方法测试了Pt-La2O3-TiO2/石墨电极对吸附在电极表面上和溶解在0.2 mol/L Na2SO4溶液中CO的氧化的电催化活性.实验结果表明,氧化镧掺入Pt-TiO2/石墨电极中可以将吸附在电极上的CO和溶液中溶解的CO的氧化电位由0.47 V降低到0.40 V(vs.SCE),改善了对CO氧化的电催化活性.A Pt-La2O3-TiO2/graphite electrode was prepared by using a sol-gel method. Cyclic voltammograms,XRD pattern and SEM techniques were employed to study the eleetrocatalytic activity of the Pt-La2O3-TiO2/graphite electrode for the oxidation of carbon monoxide adsorbed on the surface of the electrode, and dissolved in the 0.2mol/L Na2SO4 solution, respectively. Experimental results show that the Pt-TiO2/graphite electrode doped by La2O3 obviously decreases the oxidation potentials of the carbon monoxide adsorbed on the surface of the electrode and dissolved in the 0.2mol/L Na2SO4 solution from 0.47V to 0.40V （ vs. SCE）, it improves the eleetrocatalytic activity of the oxidation of CO.

关 键 词：循环伏安法 电催化 XRD衍射 扫描电镜 

分 类 号：O614[理学—无机化学]