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Analytical study and parameter-sensitivity analysis of catalytic current at a rotating disk electrode
Journal of Physics Communications Pub Date : 2020-11-12 , DOI: 10.1088/2399-6528/abc6b1
M SalaiMathi Selvi 1 , L Rajendran 1 , Marwan Abukhaled 2
Affiliation  

A convective-diffusion equation with semi-infinite boundary conditions for rotating disk electrodes under the hydrodynamic conditions is discussed and analytically solved for electrochemical catalytic reactions. The steady-state catalytic current of the rotating disk electrode is derived for various possible values of parameters by using a new approach of the homotopy perturbation method. The theoretical approach in this paper is described, for the first time, on the basis of convection–diffusion equations for the kinetics of Fenton's reagent using a platinum rotating disk electrode. The obtained approximate analytical expression for the concentrations of ferric and ferrous ions for steady-state conditions are shown to be highly accurate when compared to numerical results and other approximations found in the literature. A sensitive analysis of parameters of the current and concentration is presented.



中文翻译:

旋转圆盘电极上催化电流的分析研究和参数敏感性分析

讨论了圆盘电极在水动力条件下具有半无限边界条件的对流扩散方程,并通过解析求解了电化学催化反应。通过使用同伦摄动方法的新方法,可以得出旋转盘电极的稳态催化电流,以获得各种可能的参数值。本文首次基于对流扩散方程,使用铂金旋转盘电极对Fenton试剂进行动力学描述了本文的理论方法。与数值结果和文献中发现的其他近似值相比,所获得的稳态条件下铁和亚铁离子浓度的近似分析表达式显示出很高的准确性。

更新日期:2020-11-12
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