Dynamic electrochemical impedance spectroscopy for electrocatalytic reactions

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dc.contributor.authorSacci, Robert L.
dc.contributor.authorSeland, Frode
dc.contributor.authorHarrington, David A.
dc.date.accessioned2019-01-24T20:36:32Z
dc.date.available2019-01-24T20:36:32Z
dc.date.copyright2014en_US
dc.date.issued2014
dc.description.abstractDynamic electrochemical impedance spectroscopy with the ac signal applied while sweeping the potential, is a powerful method to study reaction mechanisms of surface electrochemical reactions. The ability to reliably measure low frequencies while sweeping is key to its successful implementation. Numerical modeling of a simple adsorption reaction is used to decide how fast the potential sweep can be at a given frequency. Careful baseline subtraction is crucial to achieve accurate results. Hardware and software implementing this method are described. With attention to issues of resolution and using the baseline correction algorithm described, accurate results can be obtained down to about 1 Hz under practical conditions. Sample experimental data is validated using the Kramers-Kronig transform and a consistency test involving the voltammogram slope and the low frequency data.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipWe thank the Natural Sciences and Engineering Research Council of Canada, the Research Council of Norway, the University of Victoria, and the Norwegian University of Science and Technology (NTNU) for financial support. RLS thanks the University of Victoria for a Nora and Mark DeGroutier Memorial Scholarship.en_US
dc.identifier.citationSacci, R.L., Seland, F. & Harrington, D.A. (2014). Dynamic electrochemical impedance spectroscopy, for electrocatalytic reactions. Electrochimica Acta, 131, 13-19. https://doi.org/10.1016/j.electacta.2014.02.120en_US
dc.identifier.urihttps://doi.org/10.1016/j.electacta.2014.02.120
dc.identifier.urihttp://hdl.handle.net/1828/10552
dc.language.isoenen_US
dc.publisherElectrochimica Actaen_US
dc.subjectDynamic
dc.subjectEIS
dc.subjectImpedance
dc.subjectFFT
dc.subject.departmentDepartment of Chemistry
dc.titleDynamic electrochemical impedance spectroscopy for electrocatalytic reactionsen_US
dc.typePostprinten_US

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