Voltammetric kinetic studies of electrode reactions: guidelines for detailed understanding of their fundamentals

González Sánchez, Joaquín; Laborda Ochando, Eduardo; Molina Gómez,  Ángela

Publication:
Voltammetric kinetic studies of electrode reactions: guidelines for detailed understanding of their fundamentals

dc.contributor.author	González Sánchez, Joaquín
dc.contributor.author	Laborda Ochando, Eduardo
dc.contributor.author	Molina Gómez, Ángela
dc.contributor.department	Química Física
dc.contributor.other	Facultad de Química
dc.date.accessioned	2026-01-25T21:16:45Z
dc.date.available	2026-01-25T21:16:45Z
dc.date.copyright	© 2022 The Authors
dc.date.issued	2022-12-27
dc.description.abstract	Theoretical and practical foundations of basic electrochemical concepts of heterogeneous charge transfer reactions that underline electrochemical processes are presented for their detailed study by undergraduate and postgraduate students. Several simple methods for calculating key variables, such as the half-wave potential, limiting current, and those implied in the kinetics of the process, are explained, discussed, and put in practice through simulations making use of an Excel document. The current–potential response of electron transfer processes of any kinetics (i.e., any degree of reversibility) are deduced and compared for electrodes of different size, geometry, and dynamics, namely: static macroelectrodes in chronoamperometry and normal pulse voltammetry, and static ultramicroelectrodes and rotating disc electrodes in steady state voltammetry. In all cases, a universal, normalized current–potential response is obtained in the case of reversible (fast) electrode reactions, whereas this is not possible for nonreversible processes. For this last situation, different widely used protocols for the determination of the kinetic parameters (the mass-transport corrected Tafel analysis and the Koutecký–Levich plot) are deduced, proposing learning activities that highlight the foundations and limitations of such protocols, as well as the influence of the mass transport conditions. Discussions on the implementation of this framework and on the benefits and difficulties found are also presented.
dc.format	application/pdf
dc.format.extent	28
dc.identifier.citation	Journal of Chemical Education 100 (2023) 697−706
dc.identifier.doi	https://doi.org/10.1021/acs.jchemed.2c00944
dc.identifier.eissn	1938-1328
dc.identifier.issn	0021-9584
dc.identifier.uri	http://hdl.handle.net/10201/193349
dc.language	eng
dc.publisher	American Chemical Society
dc.relation	Ministerio de Ciencia e Innovación (PID2019-106097GB-I00/AEI/10.13039/501100011033)
dc.relation.publisherversion	https://pubs.acs.org/doi/10.1021/acs.jchemed.2c00944
dc.rights	Attribution 4.0 International	*
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/	*
dc.subject	Electrode kinetics
dc.subject	Tafel analysis
dc.subject	Koutecký−Levich plot
dc.subject	Ultramicroelectrodes
dc.subject	Rotating disc electrode
dc.subject.ods	No relacionado con ningún objetivo de desarrollo sostenible
dc.title	Voltammetric kinetic studies of electrode reactions: guidelines for detailed understanding of their fundamentals
dc.type	info:eu-repo/semantics/article
dc.type.version	info:eu-repo/semantics/acceptedVersion
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