Electrochemical studies on glassy carbon electrodes: II. Oxygen reduction in solutions of high pH (pH>10) |
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Authors: | RJ Taylor AA Humffray |
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Institution: | Department of Physical Chemistry, University of Melbourne, Parkville, 3052 (Australia) |
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Abstract: | On the basis of measurements using rotating disc, rotating ring disc and stationary glassy carbon electrodes, together with polarization curves, reaction order and stoichiometric number determinations, a mechanism for the reduction of oxygen in aqueous solution at pH>10 is proposed. This involves an initial electron transfer, followed by rate-determining surface migration of O2? ions to active sites on the electrode surface. Differences between our interpretation of the experimental results and the conclusions of other investigators are discussed. |
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