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电化学(中英文) ›› 2011, Vol. 17 ›› Issue (4): 410-415.  doi: 10.61558/2993-074X.2863

• 研究论文 • 上一篇    下一篇

锗钨酸盐的电化学性能及GeW11Co/P-oPD/GC电极对过氧化氢的电催化还原

朱莉莉,屈建莹*,王珏,冯昊玥   

  1. 河南大学 化学化工学院,环境与分析科学研究所,河南 开封 475004
  • 收稿日期:2011-07-18 修回日期:2011-08-04 出版日期:2011-11-28 发布日期:2011-09-29
  • 通讯作者: 屈建莹 E-mail:lilyqujy@yahoo.com.cn

Electrochemical Properties of Tungstogermanate and Electrocatalysis of H2O2 on GeW11Co/P-oPD/GC Electrode

 ZHU  Li-Li, QU  Jian-Ying*, WANG  Jue, FENG  Hao-Yue   

  1. Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China
  • Received:2011-07-18 Revised:2011-08-04 Published:2011-11-28 Online:2011-09-29
  • Contact: Qu Jian-Ying E-mail:lilyqujy@yahoo.com.cn

摘要: 本文探索了杂多酸-钴取代的三聚Keggin结构锗钨酸盐([Co(H2O)3(α-GeW11CoO38)3]10-)的电化学性能,实验表明,玻碳(GC)电极上锗钨酸盐循环伏安曲线有两对可逆的氧化还原峰,峰电位差分别为31 mV和35 mV,分别对应于2电子4质子和2电子3质子电极反应过程,且该过程受吸附控制.通过电聚合将GeW11Co修饰于聚邻苯二胺(P-oPD/GC)电极上,制得GeW11Co/P-oPD/GC电极.研究表明,该电极对过氧化氢(H2O2)的还原有良好的电催化作用,其制作简便、性能稳定,响应快速.

关键词: 杂多酸, 聚邻苯二胺, 化学修饰电极, 电催化还原, 过氧化氢

Abstract: The electrochemical properties of Co-substituted trimeric tungstogermanate containing Keggin fragments were studied. Cyclic voltammograms revealed two couples of reversible redox peaks on glassy carbon (GC) electrode in acid solutions. They corresponded to two-electron reductions accompanying by the additions of four protons and three protons, respectively, both were controlled by adsorption. The differences in the peak potentials of 2-electron-4-proton and 2-electron-3-proton reactions were 31 mV and 35 mV, respectively..Furthermore, the tungstogermanate (GeW11Co) modified GC electrode with functionalization by poly(o-phenylenediamine) (P-oPD) was prepared readily by electropolymerization. The GeW11Co/P-oPD/GC electrode could electrocatalyze the reduction of hydrogen peroxide, which showed good stability and quick response.

Key words: polyoxometalate, poly(o-phenylenediamine), chemically modified electrode, electrocatalytic reduction, hydrogen peroxide

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