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Redox systems obeying Marcus-Hush-Chidsey electrode kinetics do not obey the Randles-Sevcik equation for linear sweep voltammetry

Abstract:

The cyclic voltammetry of the reaction of a solution-phase species at a macroelectrode under semi-infinite diffusion is simulated assuming irreversible electrode kinetics within the Marcus-Hush-Chidsey model. The resulting peak currents are shown to deviate from the square root dependence on voltage scan rate predicted by the Randles-Ševčík equation. Simulated voltammetry of a surface-bound redox couple also shows deviations from the expected linear dependence of peak current on scan rate. Th...

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Publication status:
Published

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Authors


Henstridge, MC More by this author
Laborda, E More by this author
Dickinson, EJF More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Chemistry, Physical and Theoretical Chem
Journal:
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume:
664
Pages:
73-79
Publication date:
2012
DOI:
ISSN:
1572-6657
URN:
uuid:2e59923c-6a70-4082-bb52-f4a07be6c847
Source identifiers:
321690
Local pid:
pubs:321690

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