钼磷酸-纳米金修饰电极的制备及其电催化作用  

Preparation and Electrocatalysis of Gold Nanoparticles Supported with Heteropolyanions Modified Electrode

作　　者：张玉[1] 王振平[1] 赵燕荣[1] 吴莹[1] 

机构地区：[1]苏州大学材料和化学化工学部,江苏苏州215123

出　　处：《常熟理工学院学报》2009年第2期59-62,共4页Journal of Changshu Institute of Technology

基　　金：江苏省教育厅基金(07KJB150100)资助项目.

摘　　要：以钼磷杂多酸作为光催化还原剂制备了表面负载钼磷杂多酸的纳米金溶胶(pMo_(12)-NGs),并将此PMo_(12)-NGs修饰到具PVP膜的玻碳电极表面,考察该修饰电极的电化学行为.实验结果表明,用光催化还原法可直接制备得到杂多酸负载量大且均匀性好的纳米金,由此制备的纳米金修饰电极具有PMo_(12)的良好的电化学行为,且电化学响应和电极稳定性优于单独PMo_(12)修饰电极,该修饰电极对IO_3^-等有明显的电催化还原作用,其催化速率常数k可达1.34×10~5mol^(-1)·L·s^(-1).Gold nanoparticles supported with Keggin heteropolyanions phosphododecamolybdates H3PMo12O40 （PMo12-NGs） were prepared by simple photoreduction technique. PMo12-NGs were successfully immobilized on the glassy carbon electrode surface with PVP film and a PMo12-NG modified electrode （PMo12-NG/PVP/GC） was obtained. The redox behaviour of PMo12-NG/PVP/GC CME was discussed. The results showed that the PMo12-NG/ PVP modified electrode exhibited high sensitivity, good reproducibility and excellent electrocatalytic activity toward the IO3^- ,the heterogeneous catalytic rate constant,k=1.34×10^5mol^-1·L·s^-1 by chronoamperometric measurement.

关 键 词：光催化还原 钼磷杂多酸 纳米金 修饰电极 电催化作用 

分 类 号：O654[理学—分析化学]