Charge Transport Processes of Immobilized Heteropolyanions at Self-assembled Monolayer Modified Gold Electrode by Electrochemical Quartz Crystal Microbalance Measurement  

作　　者：BU Xin-yuan JIAO Lian-sheng HAN Dong-xue YANG Gui-fu 

机构地区：[1]State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China [2]School of Computer Science, Northeast Normal University, Changchun 130024, P. R. China

出　　处：《Chemical Research in Chinese Universities》2009年第4期537-542,共6页高等学校化学研究（英文版）

基　　金：Supported by the Science Foundation for Young Teachers of Northeast Normal University,China(No.20081001)

摘　　要：The in situ electrochemical quartz crystal microbalance（EQCM） technique was used to investigate the ion transport of immobilized heteropolyanions at a self-assembled monolayer（SAM） modified gold electrode during electrochemical redox process.A mixed transfer method was presented to analyse the abnormal change of resonant frequency based on the simultaneous insertion/extraction of different ions.The results indicate that the migration of HSO4-anions was indispensable in the redox process of the heteropolyanions in a 1 mol/L H2SO4 solution and played a key role in the abnormal change of the resonant frequency.Such a change was attributed to different packing densities derived by means of differently immobilized methods.The in situ electrochemical quartz crystal microbalance（EQCM） technique was used to investigate the ion transport of immobilized heteropolyanions at a self-assembled monolayer（SAM） modified gold electrode during electrochemical redox process.A mixed transfer method was presented to analyse the abnormal change of resonant frequency based on the simultaneous insertion/extraction of different ions.The results indicate that the migration of HSO4-anions was indispensable in the redox process of the heteropolyanions in a 1 mol/L H2SO4 solution and played a key role in the abnormal change of the resonant frequency.Such a change was attributed to different packing densities derived by means of differently immobilized methods.

关 键 词：HETEROPOLYANION Charge transport Self-assembled monolayer Electrochemical quartz crystal microbalance 

分 类 号：O657.1[理学—分析化学] O646.54[理学—化学]