Electrocatalytic oxidation of nitrite on a vitreous carbon electrode modified with cobalt phthalocyanine

被引：246

作者：

Caro, CA

Bedioui, F

Zagal, JH

机构：

[1] Univ Santiago Chile, Fac Quim & Biol, Dept Quim Mat, Santiago, Chile

[2] Ecole Natl Super Chim, Lab Electrochim & Chim Analyt, UMR CNRS ENSCP 7575, F-75231 Paris 05, France

来源：

ELECTROCHIMICA ACTA | 2002年 / 47卷 / 09期

关键词：

D O I：

10.1016/S0013-4686(01)00875-1

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The oxidation of nitrite on a vitreous carbon electrode modified with different surface concentrations of cobalt phthalocyanine (CoPc) was investigated using cyclic voltammetry and rotating disk electrode techniques. The voltammetric curves show well-defined anodic peak. which is indicative of the electrocatalytic oxidation of nitrite. The activity of the modified electrodes does not increase with the amount of CoPc adsorbed on the electrode in a wide range of surface coverages and the order of the electro-oxidation reaction is one in nitrite. Tafel plots obtained from rotating disk measurements give two linear regions of slopes of 0.071 and 0.14 V/decade, respectively. This was discussed in terms of a catalytic process and a mechanism is proposed. (C) 2002 Elsevier Science Ltd. All rights reserved.

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页码：1489 / 1494

页数：6

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