Journal
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
Volume 18, Issue 12, Pages 3251-3257Publisher
SPRINGER
DOI: 10.1007/s10008-014-2664-z
Keywords
Mass transport; One-dimensional planar diffusion; Cottrell equation; Randles-Sevcik equation; Chronoamperometry; Cyclic voltammetry
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Funding
- Marie Curie Intra European Fellowship within the 7th European Community Framework Programme [327706]
- European Research Council under the European Union [320403]
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Simulations and experiments are reported which investigate the size of a macro disc electrode necessary to quantitatively show the chronoamperometric or voltammetric behaviour predicted by the Cottrell equation or the Randles-Sevcik equation on the basis of exclusive one-dimensional diffusional mass transport. For experimental time scales of several seconds, the contribution of radial diffusion is seen to be measurable even for electrodes of millimetres in radius. Recommendations on the size of macro electrodes for quantitative study are given and should exceed 4 mm radius in aqueous solution.
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