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.
Graphical Abstract
Keywords
polyoxometalate, poly(o-phenylenediamine), chemically modified electrode, electrocatalytic reduction, hydrogen peroxide
Publication Date
2011-11-28
Online Available Date
2011-09-29
Revised Date
2011-08-04
Received Date
2011-07-18
Recommended Citation
Li-Li ZHU, Jian-Ying QU, Jue WANG, Hao-Yue FENG.
Electrochemical Properties of Tungstogermanate and Electrocatalysis of H2O2 on GeW11Co/P-oPD/GC Electrode[J]. Journal of Electrochemistry,
2011
,
17(4): Article 10.
DOI: 10.61558/2993-074X.2863
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol17/iss4/10
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