Platinum oxide reduction kinetics on polycrystalline platinum electrodes

Show simple item record

dc.contributor.author Qile, Geer
dc.date.accessioned 2016-09-26T20:53:02Z
dc.date.available 2016-09-26T20:53:02Z
dc.date.copyright 2016 en_US
dc.date.issued 2016-09-26
dc.identifier.uri http://hdl.handle.net/1828/7569
dc.description.abstract A kinetic study on polycrystalline platinum (Pt) in sulphuric acid is presented. An electrochemical kinetic mechanism of Pt oxide reduction and surface oxide structures are proposed. The reduction reaction was studied by cyclic voltammetry (CV) and various potential programs that combine sweep and hold periods by an assembled analog instrumentation. The reduction peak was studied under three surface conditions: same oxide coverage θ and same potential E, different θ and same E, and same θ but different E, to determine the influence of θ and E on the peak potential and peak shape. The double-layer charge measured previously by dynamic electrochemical impedance spectroscopy (dEIS) was used to correct the CV baseline. Differential-equation-based models as a function of θ and E were investigated to simulate the oxide reduction and oxidation, and estimate kinetic parameters. A simple mechanism combining desorption and multi-layer growth mechanisms showed good fit with both the spread-out oxidation peak and the sharp reduction peak. A microscopic surface oxide growth model was proposed to explain the surface oxides reduction mechanism. en_US
dc.language English eng
dc.language.iso en en_US
dc.rights Available to the World Wide Web en_US
dc.subject platinum en_US
dc.subject Voltammetry en_US
dc.subject Electrochemical analysis en_US
dc.subject oxidation en_US
dc.title Platinum oxide reduction kinetics on polycrystalline platinum electrodes en_US
dc.type Thesis en_US
dc.contributor.supervisor Harrington, David A.
dc.degree.department Department of Chemistry en_US
dc.degree.level Master of Science M.Sc. en_US
dc.description.scholarlevel Graduate en_US

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search UVicSpace


My Account