The electrochemical reduction kinetics of oxygen in dimethylsulfoxide
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Colleges, School and Institutes
The quasi-reversible one-electron reduction of oxygen in dimethylsulfoxide is reported for a range of electrode materials (C, Pt, Pd, and Au) and temperatures (293–343 K). Modelling was undertaken using Butler-Volmer and symmetric Marcus-Hush methods, with the former found to provide more reproducible results for this system, in agreement with previous reports of quasi-reversible systems. The reorganisation energy for the reaction was found to be ca. 1.0 eV, and the reaction confirmed to be predominantly outer-sphere. The observed standard electrochemical rate constant (k0) is ca. 5.7 times faster for C electrodes than Pt, despite having a lower electronic density of states.
|Number of pages||4|
|Journal||Journal of Electroanalytical Chemistry|
|Early online date||2 Oct 2018|
|Publication status||Published - 15 Nov 2018|