The electrochemical reduction kinetics of oxygen in dimethylsulfoxide

Ruba Hendi; Peter H. Robbs; Beatrice Sampson; Ryan Pearce; Neil V. Rees

doi:10.1016/j.jelechem.2018.09.052

The electrochemical reduction kinetics of oxygen in dimethylsulfoxide

Ruba Hendi, Peter H. Robbs, Beatrice Sampson, Ryan Pearce, Neil V. Rees^*

^*Corresponding author for this work

Chemical Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

172 Downloads (Pure)

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.

Original language	English
Pages (from-to)	16-19
Number of pages	4
Journal	Journal of Electroanalytical Chemistry
Volume	829
Early online date	2 Oct 2018
DOIs	https://doi.org/10.1016/j.jelechem.2018.09.052
Publication status	Published - 15 Nov 2018

Keywords

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

ASJC Scopus subject areas

Analytical Chemistry
Chemical Engineering(all)
Electrochemistry

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Hendi_et_al_Electrochemical_Reduction_JECFinal published version, 756 KBLicence: Creative Commons: Attribution (CC BY)

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title = "The electrochemical reduction kinetics of oxygen in dimethylsulfoxide",

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.",

keywords = "Butler-Volmer, DMSO, Kinetics, Marcus-Hush, Outer-sphere, Oxygen, Reduction",

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T1 - The electrochemical reduction kinetics of oxygen in dimethylsulfoxide

AU - Hendi, Ruba

AU - Robbs, Peter H.

AU - Sampson, Beatrice

AU - Pearce, Ryan

AU - Rees, Neil V.

PY - 2018/11/15

Y1 - 2018/11/15

N2 - 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.

AB - 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.

KW - Butler-Volmer

KW - DMSO

KW - Kinetics

KW - Marcus-Hush

KW - Outer-sphere

KW - Oxygen

KW - Reduction

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DO - 10.1016/j.jelechem.2018.09.052

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SP - 16

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JO - Journal of Electroanalytical Chemistry

JF - Journal of Electroanalytical Chemistry

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The electrochemical reduction kinetics of oxygen in dimethylsulfoxide

Abstract

Keywords

ASJC Scopus subject areas

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