Theoretical analysis of homogeneous catalysis of electrochemical reactions: steady-state current-potential

被引：6

作者：

Rani, Ramu Usha ^{[1
]}

Rajendran, Lakshmanan ^{[2
]}

Abukhaled, Marwan ^{[3
]}

机构：

[1] Meenakshi Coll Engn, Dept Math, West KK Nagar, Chennai 600078, India

[2] AMET Univ, Dept Math, Chennai 603112, India

[3] Amer Univ Sharjah, Dept Math & Stat, Sharjah, U Arab Emirates

来源：

REACTION KINETICS MECHANISMS AND CATALYSIS | 2023年 / 136卷 / 03期

关键词：

Mathematical modelling; Electrochemical reactions; Homogeneous catalysis; Analytical method; Nonlinear equations; LIMITING CURRENTS; EC PROCESSES; 2ND-ORDER; MICROELECTRODE; CHALLENGES; PLANET; 1ST;

D O I：

10.1007/s11144-023-02407-x

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：

This article presents a theoretical analysis of homogeneous redox catalysis in electrochemical reactions. A nonlinear differential system is used as a model in which a nonlinear term is linked to homogeneous reactions. The concentration of the mediator and substrate at a planar electrode is computed using an analytical method under pure kinetic conditions and constant substrate concentration. This simplifies the analysis, which can be achieved with slow-scan rates and concentrations in real-world scenarios. The resulting current-potential responses have an S shape and are independent of the scan rate. The impact of two essential parameters on the current is investigated. The derived analytical expressions show high accuracy when compared to numerical results, which show satisfactory agreement. The limiting cases for the concentration characteristics and current-potential response are also investigated.

引用

页码：1229 / 1242

页数：14

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