dc.contributor.author | Holm, Thomas | |
dc.contributor.author | Dahlstrøm, Per Kristian | |
dc.contributor.author | Sunde, Svein | |
dc.contributor.author | Seland, Frode | |
dc.contributor.author | Harrington, David A. | |
dc.date.accessioned | 2020-01-23T13:01:05Z | |
dc.date.available | 2020-01-23T13:01:05Z | |
dc.date.created | 2019-07-21T16:37:22Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | Electrochimica Acta. 2019, 295 139-147. | nb_NO |
dc.identifier.issn | 0013-4686 | |
dc.identifier.uri | http://hdl.handle.net/11250/2637661 | |
dc.description.abstract | The methanol oxidation reaction (MOR) is studied at temperatures up to 140 °C by a combination of cyclic voltammetry, chronoamperometry, and dynamic electrochemical impedance spectroscopy (dEIS). A mechanistic analysis of the reaction is done based on the Tafel relation, the calculated activation energy, and the fitting of dEIS data. At the fuel cell relevant potentials, 0–0.80 V vs RHE, the MOR mechanism is similar at all temperatures. The rate-determining step is the adsorption of water at low overpotentials (< 0.50 V vs RHE), a combination of the methanol adsorption reaction and the surface reaction between adsorbed CO and OH at intermediate potentials (0.50–0.65 V vs RHE), and the methanol adsorption reaction at high potentials (> 0.65 V vs RHE). The shoulder on the oxidation peak at 0.60–0.65 V vs RHE corresponds well with where the CO coverage approaches zero. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Elsevier | nb_NO |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no | * |
dc.title | Dynamic electrochemical impedance study of methanol oxidation at Pt at elevated temperatures | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | acceptedVersion | nb_NO |
dc.source.pagenumber | 139-147 | nb_NO |
dc.source.volume | 295 | nb_NO |
dc.source.journal | Electrochimica Acta | nb_NO |
dc.identifier.doi | 10.1016/j.electacta.2018.10.071 | |
dc.identifier.cristin | 1712226 | |
dc.description.localcode | © 2018. This is the authors’ accepted and refereed manuscript to the article. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | nb_NO |
cristin.unitcode | 194,66,35,0 | |
cristin.unitname | Institutt for materialteknologi | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 2 | |