Electrocatalytic reduction of dioxygen by cobalt porphyrin-modified glassy carbon electrode with single-walled carbon nanotubes and nafion in aqueous solutions

被引：38

作者：

Choi, Ayoung ^{[1
,2
]}

Jeong, Haesang ^{[1
,2
]}

Kim, Songmi ^{[1
,2
]}

Jo, Suhee ^{[1
,2
]}

Jeon, Seungwon ^{[1
,2
]}

机构：

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

[2] Chonnam Natl Univ, Inst Basic Sci, Kwangju 500757, South Korea

来源：

ELECTROCHIMICA ACTA | 2008年 / 53卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

single-walled carbon nanotubes; cobalt porphyrins; glassy carbon electrode; electrocatalysis; dioxygen reduction;

D O I：

10.1016/j.electacta.2007.10.029

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Cobalt porphyrin (CoP)modified glassy carbon electrode (GCE) with sin, strated le-walled carbon nanotubes (SWNTs) and Nafion demonstrated a higher electrocatalytic activity for the reduction of dioxygen in 0.1 M H2SO4 solution. Cyclic and hydrodynamic voltammetry at the CoP-SWNTs/GCE-modified electrodes in O-2-saturated aqueous solutions was used to study the electrocatalytic pathway. Compared with the CoP/GCE-modified electrodes, the reduction potential of dioxygen at the CoP-SWNTs/GCE-modified electrodes wits shifted to the positive direction and the limiting current was greatly increased. Especially, the Co(TMPP)-SWNTs/GCE-modified electrode was catalyzed effectively by the 4e(-) reduction of dioxygen to water, because hydrodynamic voltammetry revealed the transference of approximately lour electrons for dioxygen reduction and the minimal generation of hydrogen peroxide in the process of dioxygen reduction. (c) 2007 Published by Elsevier Ltd.

引用

页码：2579 / 2584

页数：6

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