ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY OF COBALT(II)-HEXACYANOFERRATE FILM MODIFIED ELECTRODES

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: GAO ZQ, BOBACKA J, IVASKA A
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication year: 1993
Journal: Electrochimica Acta
Journal acronym: ELECTROCHIM ACTA
Volume number: 38
Issue number: 2-3
Start page: 379
End page: 385
Number of pages: 7
ISSN: 0013-4686


Abstract

ac impedance studies on cobalt(II)-hexacyanoferrate (CoHCF) film modified electrodes have been carried out in different aqueous solutions. The experimental impedance data were fitted to an equivalent electrical circuit giving values of the different electrochemical parameters associated with mass transport, charge transfer and double layer. Charge transfer resistances measured at the standard potential of the system are rather low and in agreement with the highly reversible behaviour of this modified electrode as found in cyclic voltammetry. The value of the capacitance associated with the film was found to vary with the concentration of the electrolyte.


Keywords

CHEMICALLY MODIFIED ELECTRODE, Cobalt, HEXACYANOFERRATE, INORGANIC FILM

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