Electrocatalytic reduction of dioxygen at carbon electrodes modified with Co(II)-Schiff base complexes in various pH solutions

被引：0

作者：

Choi, YK ^{[1
]}

Park, JK ^{[1
]}

Jeon, SW ^{[1
]}

机构：

[1] Chonnam Natl Univ, Dept Chem, Kwangju 500757, South Korea

来源：

ELECTROANALYSIS | 1999年 / 11卷 / 02期

关键词：

Schiff base; dioxygen reduction; modified electrode; electrocatalyst;

D O I：

10.1002/(SICI)1521-4109(199902)11:2<134::AID-ELAN134>3.3.CO;2-Z

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 and chronoamperometry at a glassy carbon electrode and a carbon microelectrode modified with Schiff base Co(II) complex in a dioxygen saturated 1 M KOH aqueous solution of various pH and temperature. The electrochemical reduction of dioxygen at the modified electrode establishes a pathway of two-electron reduction to form hydrogen peroxide. The reduction potential (E-p) of dioxygen shows pH dependence. The electrochemical reduction of dioxygen is irreversible and diffusion controlled. The activation energy obtained from Arrhenius plots for the reduction of dioxygen was 3.64 kcal/mol at the bare glassy carbon electrode? whereas it was 2.51 Kcal/mol at the modified glassy carbon electrode.

引用

页码：134 / 138

页数：5

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