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高等学校化学研究 ›› 2009, Vol. 25 ›› Issue (4): 537-542.

• Articles • 上一篇    下一篇

Charge Transport Processes of Immobilized Heteropolyanions atSelf-assembled Monolayer Modified Gold Electrode byElectrochemical Quartz Crystal Microbalance Measurement

BU Xin-yuan1, JIAO Lian-sheng1, HAN Dong-xue1* and YANG Gui-fu1,2*   

  1. 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
  • 收稿日期:2008-07-30 修回日期:2009-03-18 出版日期:2009-07-25 发布日期:2009-10-16
  • 通讯作者: HAN Dong-xue. E-mail: dxhan@ciac.jl.cn; YANG Gui-fu. E-mail: gfyang@ciac.jl.cn
  • 基金资助:

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

Charge Transport Processes of Immobilized Heteropolyanions atSelf-assembled Monolayer Modified Gold Electrode byElectrochemical Quartz Crystal Microbalance Measurement

BU Xin-yuan1, JIAO Lian-sheng1, HAN Dong-xue1* and YANG Gui-fu1,2*   

  1. 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
  • Received:2008-07-30 Revised:2009-03-18 Online:2009-07-25 Published:2009-10-16
  • Contact: HAN Dong-xue. E-mail: dxhan@ciac.jl.cn; YANG Gui-fu. E-mail: gfyang@ciac.jl.cn
  • Supported by:

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

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Abstract:

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.

Key words: Heteropolyanion; Charge transport; Self-assembled monolayer; Electrochemical quartz crystal microba- lance