Understanding reaction mechanisms using dynamic electrochemical impedance spectroscopy: Methanol oxidation on Pt

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dc.contributor.authorHolm, Thomas
dc.contributor.authorSunde, Svein
dc.contributor.authorSeland, Frode
dc.contributor.authorHarrington, David A.
dc.date.accessioned2019-09-18T22:26:51Z
dc.date.copyright2019en_US
dc.date.issued2019
dc.description.abstractData from a combined cyclic voltammetry and dynamic electrochemical impedance spectroscopy (dEIS) study of the methanol oxidation reaction (MOR) at high temperatures was revisited using a new method for mechanistic modeling. Through iterative optimization of kinetic parameters, a total of five reaction mechanisms of the indirect pathway of the MOR were modeled. The calculated dEIS spectra from the kinetic parameters were used to verify the reaction mechanisms and best fits were found where i) water adsorption is reversible and hinders the MOR at lower potentials (< 0.50 V vs RHE), and ii) the surface reaction between adsorbed CO and OH is chemical.en_US
dc.description.embargo2021
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipThis work was financially supported by the Natural Sciences and Engineering Research Council of Canada through its Discovery Frontiers program (Engineered Nickel Catalysts for Electrochemical Clean Energy project administered from Queen's University, grant RGPNM 477963-2015) and Discovery Grants program (grant RGPIN-2017-04045), and by the Research Council of Norway through the FRIPRO (project 221899) and INTPART (project 261620) programs. T.H. thanks the Faculty of Natural Sciences at NTNU for a scholarship.en_US
dc.identifier.citationHolm, T., Sunde, S., Seland, F. & Harrington, D.A. (2019). Understanding reaction mechanisms using dynamic electrochemical impedance spectroscopy: Methanol oxidation on Pt. Electrochimica Acta, 323, 134764. https://doi.org/10.1016/j.electacta.2019.134764en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.electacta.2019.134764
dc.identifier.urihttp://hdl.handle.net/1828/11165
dc.language.isoenen_US
dc.publisherElectrochimica Actaen_US
dc.subjectDynamic electrochemical impedance spectroscopy
dc.subjectMethanol oxidation
dc.subjectTemperature
dc.subjectReaction mechanism
dc.subject.departmentDepartment of Chemistry
dc.titleUnderstanding reaction mechanisms using dynamic electrochemical impedance spectroscopy: Methanol oxidation on Pten_US
dc.typePostprinten_US

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