Characterization of the Electrocatalytic Response of Monolayer-Modified Electrodes with Square-Wave Voltammetry

被引：10

作者：

Gonzalez, J. ^{[1
]}

Molina, A. ^{[1
]}

Martinez Ortiz, F. ^{[1
]}

Laborda, E. ^{[2
]}

机构：

[1] Univ Murcia, Dept Quim Fis, E-30100 Murcia, Spain

[2] Univ Oxford, Phys & Theoret Chem Lab, Dept Chem, Oxford OX1 3QZ, England

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 20期

关键词：

CHEMICALLY-MODIFIED ELECTRODES; POTENTIAL STEP TECHNIQUES; CATALYTIC MECHANISM; CYCLIC VOLTAMMETRY; LINEAR SWEEP; MICROELECTRODES; MOLECULES; PULSE;

D O I：

10.1021/jp303171f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An approximate analytical, explicit, and easily manageable equation is given for the electrochemical response in square-wave voltammetry at spherical electrodes and ultramicroelectrodes of the Nernstian redox conversion of a surface-attached couple that catalyzes the transformation of a substrate in solution. From this equation, simple expressions for limiting cases of interest correspoding to first-order catalysis and small electrodes will be deduced. Moreover, the influence of the electrode radius on the total current will be analyzed by showing that the response presents three different behaviors depending on the values of the rate constant of the chemical step and on the electrode radius. This has allowed us to construct a zone diagram for a complete characterization of the electrochemical response of these processes.

引用

页码：11206 / 11215

页数：10

共 38 条

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