Electroreduction of methyl viologen in the presence of nitrite. Its influence on enzymatic electrodes

被引：20

作者：

Ferreyra, NF ^{[1
]}

Dassie, SA ^{[1
]}

Solis, VM ^{[1
]}

机构：

[1] Univ Nacl Cordoba, Fac Ciencias Quim, Dept Fis Quim, INFIQC, RA-5000 Cordoba, Argentina

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2000年 / 486卷 / 02期

关键词：

methyl viologen; nitrite; enzymatic mediators; EC electrocatalytic mechanism; nitrate reductase;

D O I：

10.1016/S0022-0728(00)00127-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The electroreduction of methyl viologen (MV) in the presence of nitrite was studied by cyclic voltammetry. A catalytic wave for the reduction of MV2+ was observed at - 0.740 V for which an EC catalytic mechanism is proposed. The rate constant for this chemical reaction under pseudo-first-order conditions, evaluated using working curves, was employed in the simulation of the voltammetric response. The second-order rate constant was also evaluated. Influences of the reaction at - 0.800 V on enzymatic electrodes employing nitrate reductase (NR) and MV.+ as mediator were also analysed by chronoamperometry. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：126 / 132

页数：7

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