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Linear Sweep and Cyclic Voltammetries of Reversible Ion Transfer Processes at Macro‐ and Microcapillaries under Transient Regime
Author(s) -
Molina A.,
Laborda E.,
González J.,
Compton R. G.
Publication year - 2015
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201400398
Subject(s) - cyclic voltammetry , horizontal scan rate , linear sweep voltammetry , capillary action , ion , diffusion , electrochemistry , chemistry , voltammetry , analytical chemistry (journal) , electrode , transient (computer programming) , thermodynamics , materials science , chromatography , physics , organic chemistry , operating system , computer science
The voltammetry corresponding to the reversible transfer of an ionic species across a liquid|liquid interface supported at the tip of a capillary is modelled with an approximate analytical treatment. The solution obtained enables the calculation of the electrochemical response in any voltammetric technique when capillaries of any size are employed, including micro‐ and macro‐ liquid|liquid interfaces. The theory is applied to study the effect of the key system variables (capillary size, scan rate and ion diffusion coefficients) on the response obtained in cyclic voltammetry. In all cases, the explicit solution presented provides good description of the influence of the above variables and it allows for the accurate determination of the formal transfer potential.