Simplifying mechanistic impedances

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dc.contributor.authorHarrington, David A.
dc.date.accessioned2020-02-28T20:42:46Z
dc.date.copyright2020en_US
dc.date.issued2020
dc.description.abstractCommon simplifying concepts of chemical kinetics, such as rate-determining and preequilibium steps, can be used to simplify the formulation of the electrochemical impedance for reaction mechanisms. A general strategy for eliminating kinetic parameters of preequilibrium steps from the governing equations is presented, which enables simpler subsequent generation of the impedance spectra and associated equivalent circuits. Examples that are various subcases of a metal electrode with simultaneous hydrogen evolution and hydrogen adsorption into the metal are discussed. The relationship of the apparent charge-transfer resistance to the true charge-transfer resistance is discussed. Examples are given where the presence of adsorption is masked and may not be easily detected in an impedance analysis.en_US
dc.description.embargo2022-05-01
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipI thank the Natural Sciences and Engineering Research Council of Canada (Discovery grant RGPIN-2017-04045) for financial support of this work.en_US
dc.identifier.citationHarrington, D.A. (2020). Simplifying mechanistic impedances. Electrochimica Acta, 338, 135895. https://doi.org/10.1016/j.electacta.2020.135895en_US
dc.identifier.urihttps://doi.org/10.1016/j.electacta.2020.135895
dc.identifier.urihttp://hdl.handle.net/1828/11591
dc.language.isoenen_US
dc.publisherElectrochimica Actaen_US
dc.subjectRate-determining step
dc.subjectEquivalent circuits
dc.subjectImpedance
dc.subjectDevanathan-Stachurski
dc.subjectAbsorption
dc.subjectPreequilibrium
dc.subject.departmentDepartment of Chemistry
dc.titleSimplifying mechanistic impedancesen_US
dc.typeArticleen_US

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