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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]
Copyright of Sigma: Journal of Engineering & Natural Sciences / Mühendislik ve Fen Bilimleri Dergisi is the property of Sigma: Journal of Engineering & Natural Sciences / Mühendislik ve Fen Bilimleri Dergisi and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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  Data: Exploring transient potential steps on rotating disk electrodes with steady-state concentration profiles in single electron transfer reactions.
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  Data: <searchLink fieldCode="DE" term="%22Rotating+disk+electrodes%22">Rotating disk electrodes</searchLink><br /><searchLink fieldCode="DE" term="%22Single+electron+transfer+mechanisms%22">Single electron transfer mechanisms</searchLink><br /><searchLink fieldCode="DE" term="%22Electrode+reactions%22">Electrode reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+reactions%22">Chemical reactions</searchLink><br /><searchLink fieldCode="DE" term="%22Concentration+gradient%22">Concentration gradient</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemical+experiments%22">Electrochemical experiments</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink>
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  Data: 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]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Sigma: Journal of Engineering & Natural Sciences / Mühendislik ve Fen Bilimleri Dergisi is the property of Sigma: Journal of Engineering & Natural Sciences / Mühendislik ve Fen Bilimleri Dergisi and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.14744/sigma.2025.00103
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        Text: English
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      – SubjectFull: Rotating disk electrodes
        Type: general
      – SubjectFull: Single electron transfer mechanisms
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      – SubjectFull: Electrode reactions
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      – SubjectFull: Concentration gradient
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      – SubjectFull: Electrochemical experiments
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      – SubjectFull: Computer simulation
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              Text: Apr2026
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              Y: 2026
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