Effect of electrode pretreatment on the cyclic voltammetry of VO 2+/VO2+ at a glassy carbon electrode

A. Bourke, R. P. Lynch, D. N. Buckley

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

20 Citations (Scopus)

Abstract

It is shown by cyclic voltammetry and current measurements at constant potential that, when glassy carbon electrodes are pretreated by polarization at potentials more positive than 0.5 V (sat. Hg/Hg2SO4), they are subsequently less active for oxidation of VO2+. The activity of the electrode is recovered by polarization at negative potentials. At any given potential a characteristic amount of electrode deactivation occurs in a relatively short time (∼60 s) and further pretreatment at that potential does not further deactivate the electrode. It is suggested that the level of deactivation is determined by processes that are primarily dependent on potential rather than on kinetics and involve the formation of oxygen species that interact with active sites on the carbon surface.

Original languageEnglish
Title of host publicationEnergy Technology/Battery (General) - 223rd ECS Meeting
PublisherElectrochemical Society, Inc.
Pages59-67
Number of pages9
Edition30
ISBN (Print)9781607684824
DOIs
Publication statusPublished - 2013
Externally publishedYes
EventSymposium on Energy Technology/Battery - Joint General Session - 223rd Meeting of the Electrochemical Society - Toronto, ON, Canada
Duration: 12 May 201316 May 2013

Publication series

NameECS Transactions
Number30
Volume53
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

ConferenceSymposium on Energy Technology/Battery - Joint General Session - 223rd Meeting of the Electrochemical Society
Country/TerritoryCanada
CityToronto, ON
Period12/05/201316/05/2013

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