[SiNi(H_2O)W_(11)O_(39)]^(6-)多层组装膜修饰电极及其电化学行为  

Assembly of [SiNi(H_2O)W_(11)O_(39)]^(6-) on a glassy carbon electrode and its electrochemical behavior

作　　者：杜金艳[1] 吕桂琴[2] 郑传明[2] 吴华强[1] 

机构地区：[1]安徽师范大学化学与材料科学学院,芜湖241000 [2]北京理工大学理学院,北京100081

出　　处：《分析试验室》2007年第1期58-61,共4页Chinese Journal of Analysis Laboratory

基　　金：安徽省高校青年教师科研资助计划(2006jq1052)项目资助

摘　　要：采用电化学生长法制备包含杂多酸[SiNi(H2O)W11O39]6-(SiNiW11)和聚合物阳离子PDDA的多层膜修饰电极,利用循环伏安法研究其电化学行为、pH的影响及其对BrO3-和NO2-体系还原的电催化性能;并对多层膜电化学过程机理进行了初步探讨。结果表明:多层膜的增长均匀,峰电流随层数的增加而增加;多层膜的峰电流随扫速的增加而增加;还原峰的峰电位随pH的增加而负移。A new electrode was modified by multilayer films composed of heteropolyanion （SiNiW11） and cationic polymer poly （diallyldimethylammonium chloride） through electrochemical growth. The electrochemical modified electrode behavior, the effect of solution pH and electrocatalytic response to the reduction of BrO3 - and NO2 - have been investigated. The electrochemical mechanism of multilayer films was proposed. The result shows that the films grow uniformly, and the peak currents increase with increasing layers. The peak currents increase with increase of scan rate, and the reduction potentials of multilayer films shift negatively with increasing pH.

关 键 词：[SiNi(H2O)W11O39]^6- 循环伏安 多层组装膜 电催化 

分 类 号：O557.1[理学—热学与物质分子运动论]