Exploring transient potential steps on rotating disk electrodes with steady-state concentration profiles in single electron transfer reactions.

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Title:	Exploring transient potential steps on rotating disk electrodes with steady-state concentration profiles in single electron transfer reactions.
Authors:	SREELATHA DEVI, V.¹ sreelatu@gmail.com, KAVITHA, A.², SURESH, M. L.³, VIJAYABALAN, D.², LOGANATHAN, T.⁴, MANIMUTHUKUMAR, R.⁵
Source:	Sigma: Journal of Engineering & Natural Sciences / Mühendislik ve Fen Bilimleri Dergisi. Apr2026, Vol. 44 Issue 2, p1440-1455. 16p.
Subjects:	Rotating disk electrodes, Single electron transfer mechanisms, Electrode reactions, Chemical reactions, Concentration gradient, Electrochemical experiments, Computer simulation
Abstract:	This study develops a theoretical model to analyze transient currents in one-electron transfer reactions over rotating disk electrodes for quasi-reversible and irreversible processes. The model employs the nearest diffusion layer approximation, separation of variables, variational iteration, and two-point pade approximation methods to derive concentration profiles. The techniques not only yield better precision and reliability of electrochemical measurements through considerations of transient currents and background current rejection in solid-state electrochemical systems, thereby improving the precision and interpretation of experiments devoted to rotating disk electrodes. Analytical expressions for the concentrations of oxidized and reduced species are obtained, enabling the examination of how parameters operate on current during the transition between activation-controlled currents. The steady-state background current has also solutions given in closed form. Lastly, we came to the conclusion that numerical simulation is employed to explain and differentiate between reversible and quasireversible electrode processes. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	This study develops a theoretical model to analyze transient currents in one-electron transfer reactions over rotating disk electrodes for quasi-reversible and irreversible processes. The model employs the nearest diffusion layer approximation, separation of variables, variational iteration, and two-point pade approximation methods to derive concentration profiles. The techniques not only yield better precision and reliability of electrochemical measurements through considerations of transient currents and background current rejection in solid-state electrochemical systems, thereby improving the precision and interpretation of experiments devoted to rotating disk electrodes. Analytical expressions for the concentrations of oxidized and reduced species are obtained, enabling the examination of how parameters operate on current during the transition between activation-controlled currents. The steady-state background current has also solutions given in closed form. Lastly, we came to the conclusion that numerical simulation is employed to explain and differentiate between reversible and quasireversible electrode processes. [ABSTRACT FROM AUTHOR]
ISSN:	13047191
DOI:	10.14744/sigma.2025.00103