The oxygen evolution reaction on passive oxide covered transition metal electrodes in alkaline solution. Part 2-Cobalt.
Citation:
M E G Lyons M P Brandon `The oxygen evolution reaction on passive oxide covered transition metal electrodes in alkaline solution. Part 2-Cobalt? in International Journal of Electrochemical Science, 3, (12), 2008, pp 1425 - 1462Download Item:
Lyons Brandon IJES 2008 OER paper 2 3121425.pdf (published (publisher copy) peer-reviewed) 793.7Kb
Abstract:
Details are outlined of an electrochemical investigation of the oxygen evolution reaction (OER) at
passive oxide covered polycrystalline Co electrodes in aqueous alkaline solution. Kinetic studies on
electrodes subjected to different pre-treatment routines, yielded different values of the Tafel slope and
the reaction order with respect to OH- activity. Only one mechanistic pathway could account for all
observed values of these kinetic parameters. This pathway is similar, although not identical, to that
proposed, in the first paper of this series, for the reaction at oxide covered Ni anodes. Using cyclic
voltammetry it was shown that the mechanism for the initial passivation of Co electrodes varies with
OH- concentration. This in turn can have an effect on the experimental value of the OER Tafel slope, a
phenomenon which can be rationalized in terms of a dual energy barrier model.
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Enterprise Ireland
Irish Research Council for Science Engineering and Technology
Higher Education Authority
Author's Homepage:
http://people.tcd.ie/melyonsDescription:
PUBLISHED
Author: LYONS, MICHAEL EDWARD
Publisher:
Electrochemical Science GroupType of material:
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Series/Report no:
International Journal of Electrochemical Science3
12
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