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- Title
The excess current in cyclic voltammetry arising from the presence of an electrode edge.
- Authors
Myland, Jan; Oldham, Keith
- Abstract
The popular inlaid disc electrode suffers from an edge effect that is usually, and sometimes unwarrantedly, ignored in analyzing transient voltammograms. This study addresses the role played by the edge in linear scan and cyclic voltammetries when the electron transfer is reversible or quasi-reversible. A simulation models the concentrations, current densities and currents in two circumstances-when the edge in important and when it is absent-simultaneously, and thereby the evolving edge current is quantified. Special attention is paid to the effect that the edge has on the heights and positions of the voltammetric peaks. It is demonstrated that disregarding the edge may lead to the bogus classification of a reversible electrode reaction as quasi-reversible.
- Subjects
CYCLIC voltammetry; OXIDATION-reduction reaction; ELECTRODE reactions; ROTATIONAL symmetry; CURRENT density (Electromagnetism)
- Publication
Journal of Solid State Electrochemistry, 2014, Vol 18, Issue 12, p3259
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-014-2652-3