Oxygen reduction on NixCo3-xO4 spinel particles/polypyrrole composite electrodes:: hydrogen peroxide formation

被引：48
|
作者：
Nguyen-Cong, H
Guadarrama, VD
Gautier, JL
Chartier, P
机构：
[1] Univ Strasbourg, Fac Chim, Lab Electrochim & Chim Phys Corps Solide, CNRS,ULP,UMR 7512, F-67000 Strasbourg, France
[2] Univ Santiago Chile, Fac Chem & Biol, Dept Chem Mat, Santiago, Chile
来源：
ELECTROCHIMICA ACTA | 2003年 / 48卷 / 17期
关键词：
composite electrodes; polypyrrole; mixed valence oxides; oxygen reduction reaction; hydrogen peroxide;
D O I：
10.1016/S0013-4686(03)00252-4
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The oxygen reduction reaction (orr) was studied on composite electrodes GC/PPy/PPy(NixCo3-xO4)/PPY with x =0.3 and 1, in 2.5 x 10(-3) M KOH+0.8 M KCl at room temperature. The orr takes place on the oxide particles with formation of hydrogen peroxide (H2O2), which diffuses through the polymer layers to reach the bulk of electrolyte solution. The amount of H2O2 produced, determined indirectly by iodine spectrometry, depended strongly on the oxide stoichiometry. The effects of the orr and of the generation of H2O2 on the conductivity of PPy and on the behaviour of the embedded oxide particles are discussed. (C) 2003 Elsevier Science Ltd. All rights reserved.
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收藏
页码：2389 / 2395
页数：7
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