Electrochemical Properties of Tungstogermanate and Electrocatalysis of H2O2 on GeW11Co/P-oPD/GC Electrode
- 2011年第17卷 
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.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.