Electrocatalytic reduction of dioxygen on the surface of glassy carbon electrodes modified with dicobalt diporphyrin complexes

被引：25

作者：

Lu, WB ^{[1
]}

Wang, CX ^{[1
]}

Lv, QY ^{[1
]}

Zhou, XH ^{[1
]}

机构：

[1] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2003年 / 558卷

关键词：

chemically modified electrode; oxygen reduction; electrocatalytic reduction; dicobalt diporphyrin complexes;

D O I：

10.1016/S0022-0728(03)00377-2

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The electrocatalytic reduction of dioxygen has been studied by cyclic voltammetry at glassy carbon electrodes (GCEs) modified with four different dicobalt diporphyrin complexes in dioxygen-saturated aqueous solutions. The electroreduction of O-2 on modified GCEs is irreversible and diffusion-controlled. Under the catalysis of these metallodiporphyrins, dioxygen reduces to hydrogen peroxide via a two-electron process. The results reveal that the geometric conformation of diporphyrins determines whether dioxygen is reduced by a four-electron process to water or via a two-electron change to hydrogen peroxide. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：59 / 63

页数：5

共 18 条

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