Method for studying high temperature aqueous electrochemical systems: Methanol and glycerol oxidation

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dc.contributor.authorHolm, Thomas
dc.contributor.authorDahlstrøm, Per Kristian
dc.contributor.authorBurheim, Odne S.
dc.contributor.authorSunde, Svein
dc.contributor.authorHarrington, David A.
dc.contributor.authorSeland, Frode
dc.date.accessioned2019-02-03T21:37:59Z
dc.date.available2019-02-03T21:37:59Z
dc.date.copyright2016en_US
dc.date.issued2016
dc.description.abstractA method for high purity aqueous electrochemical experiments at temperatures above the normal boiling point of water and at temperatures up to 140 °C is described. A three-electrode cell in a self-pressurized glass autoclave is heated in an oil bath. Slow ramping of the temperature allows efficient acquisition of kinetic parameters such as activation energies, oxidation onset potentials and Tafel slopes by using cyclic voltammetry. The oxidation of two organic alcohols with different volatilities, methanol (high volatility) and glycerol (low volatility), are studied to demonstrate the capabilities of the method. Methanol oxidation on platinum is found to have a similar mechanism at all temperatures, with either dissociative adsorption of water or dissociative adsorption of methanol as the rate-determining step. In the case of glycerol oxidation on platinum, the mechanism changes at 110 °C. At low temperatures dissociative adsorption of water or dissociative adsorption of glycerol is suggested to be the rate-determining step. At higher temperatures, a significant decrease in onset potential was observed and the glycerol is suggested to selectively oxidize to glyceraldehyde or dihydroxyacetone, with dissociative glycerol adsorption as the rate-determining step.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipFinancial support from the Natural Sciences and Engineering Research Council of Canada (discovery grant 37035), the Research Council of Norway (project 221899), the University of Victoria, and the Norwegian University of Science and Technology is gratefully acknowledged. This research was conducted in part under the Engineered Nickel Catalysts for Electrochemical Clean Energy project administered from Queen's University and supported by Grant No. RGPNM 477963-2015 under the Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Frontiers Program. Thomas Holm thanks the Faculty of Natural Sciences and Technology at Norwegian University of Science and Technology for the award of a scholarship.en_US
dc.identifier.citationHolm, T., Dahlstrøm, P.K., Burheim, O.S., Sunde, S., Harrington, D.A. & Seland, F. (2016). Method for studying high temperature aqueous electrochemical systems: Methanol and glycerol oxidation. Electrochimica Acta, 222, 1792-1799. https://doi.org/10.1016/j.electacta.2016.11.130en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.electacta.2016.11.130
dc.identifier.urihttp://hdl.handle.net/1828/10576
dc.language.isoenen_US
dc.publisherElectrochimica Actaen_US
dc.subjectPt electrodes
dc.subjectElectrocatalysis
dc.subjectMethanol
dc.subjectGlycerol
dc.subjectTemperature
dc.subject.departmentDepartment of Chemistry
dc.titleMethod for studying high temperature aqueous electrochemical systems: Methanol and glycerol oxidationen_US
dc.typeArticleen_US

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