Electrocatalytic reduction of H2O2 at P2Mo18O626- modified glassy carbon

被引：92
|
作者：
Martel, D [1 ]
Kuhn, A [1 ]
机构：
[1] Ecole Natl Super Chim & Phys Bordeaux, Lab Analyse Chim Reconnaissance Mol, F-33402 Talence, France
来源：
ELECTROCHIMICA ACTA | 2000年 / 45卷 / 11期
关键词：
modified electrodes; electrocatalysis; polyoxometalate; monolayer; multilayer;
D O I：
10.1016/S0013-4686(99)00399-0
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Catalysis of the electroreduction of H2O2 by the polyoxometalate P2Mo18O626- is described. The presence of polyoxometalate in solution leads to electrocatalytic currents at potentials as positive as + 0.35 V versus Ag/AgCl. Modification of the surface of a glassy carbon electrode by adsorption of P2Mo18O626- results in the formation of an anionic monolayer showing catalytic redox activity at the same unusual potential. The currents of H2O2 electroreduction can be greatly enhanced by coating the electrode with multiple layers of polyoxometalate and a charge balancing cation. A possible catalytic mechanism is proposed. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1829 / 1836
页数：8
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