The electrochemical reduction kinetics of oxygen in dimethylsulfoxide

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Authors

Colleges, School and Institutes

Abstract

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.

Details

Original languageEnglish
Pages (from-to)16-19
Number of pages4
JournalJournal of Electroanalytical Chemistry
Volume829
Early online date2 Oct 2018
Publication statusPublished - 15 Nov 2018

Keywords

  • Butler-Volmer, DMSO, Kinetics, Marcus-Hush, Outer-sphere, Oxygen, Reduction