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1、载铂聚苯胺_聚砜复合膜修饰电极对甲醇的电催化氧化行为研究第38卷第4期2009年4月应用化工AppliedChemicalIndustryVo.l38No.4Apr.2009收稿日期:2009-02-07修改稿日期:2009-02-23基金项目:宝鸡文理学院院级重点项目(ZK08118)作者简介:任莉君(1981-),女,陕西兴平人,宝鸡文理学院助教,硕士,主要从事电极材料方面的研究。电话:13619276562,E-mai:lrenlijun.wind@163.com载铂聚苯胺/聚砜复合膜修饰电极对甲醇的电催化氧化
2、行为研究任莉君1,胡中爱2,李宗孝1,王晓梅1(1.宝鸡文理学院化学化工系,陕西宝鸡721013;2.西北师范大学化学化工学院,甘肃兰州730070)摘要:采用循环伏安法制备聚苯胺(PAN)/聚砜(PSF)复合膜修饰电极,在其上电沉积铂粒子,制得载铂聚苯胺/聚砜复合膜修饰电极,用循环伏安法和交流阻抗法研究它对甲醇的电催化氧化行为。复合膜的化学组分用FTIR进行表征,复合膜内层载铂后的表面形态用SEM进行表征。结果表明,复合膜的内层(与工作电极接触的一面)是聚苯胺,外层(与溶液接触的一面)是聚砜,铂粒子在复合膜内层的多
3、孔聚苯胺上均匀沉积,从而使载铂聚苯胺/聚砜复合膜修饰电极对甲醇有好的电催化氧化性能。关键词:载铂聚苯胺/聚砜(PAN/PSF);复合膜修饰电极;循环伏安;交流阻抗谱;电催化氧化中图分类号:TB332;O657.1文献标识码:A文章编号:1671-3206(2009)04-0520-05Studyonelectrocatalyticperformanceoftheplatinum-modifiedpolyaniline/polysulfonecompositefilmelectrodesformethanoloxida
4、tionRENLi-jun1,HUZhong-ai2,LIZong-xiao1,WANGXiao-mei1(1.DepartmentofChemistryandChemicalEngineering,BaojiUniversityofArtsandSciences,Baoji721013,China;2.CollegeofChemistryandChemicalEngineering,NorthwestNormalUniversity,Lanzhou730070,China)Abstract:Polyaniline(
5、PAN)/polysulfone(PSF)compositefilmmodified-electrodeswerepreparedbyelectropolymerizationusingcyclicvotammetrytechnique.Theplatinum-modifiedPAN/PSFwaspreparedthroughelectrodepositionplatinum.Theelectrocatalyticperformanceoftheplatinum-modifiedpolyaniline/polysul
6、fonecompositefilmelectrodesformethanoloxidationwerecheckedbycyclicvotammetryandelectrochemicalimpedancespectroscopy.ThechemicalcomponentofthePAN/PSFcompositefilmwascharacterizedbyFTIRspectra,themorphologyoftheinnerlayercompositefilmafterplatinumdepositionwasobs
7、ervedbySEM.Theresultshowsthattheinnerlayer(incontactwiththeworkingelectrode)ofthefilmsispolypaniline,whiletheouterlayer(incontactwiththesolution)ofthefilmsispolysulfone.Theplatinumparticleshomodispersedintheinnerporouspolypanilinelayerafterelectrodepositionofpl
8、atinumparticlesonthecompositefilmmodifiedelectrodesandtheplatinum-modifiedPAN/PSFcompositefilmelectrodeshaveexcellentelectrocatalyticactivityformethanoloxidation.Keywords:PA