Theory of Kinetically Controlled Electrode Reaction Coupled to Ion Transfer across the Liquid/Liquid Interface

Authors

  • Šebojka Komorsky-Lovrić,

    1. Department for Marine and Environmental Research, “Ruđer Bošković” Institute, P.O. Box 180, Zagreb, HR-10002, Hrvatska (Croatia)
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  • Milivoj Lovrić

    Corresponding author
    1. Department for Marine and Environmental Research, “Ruđer Bošković” Institute, P.O. Box 180, Zagreb, HR-10002, Hrvatska (Croatia)
    • Department for Marine and Environmental Research, “Ruđer Bošković” Institute, P.O. Box 180, Zagreb, HR-10002, Hrvatska (Croatia)

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Abstract

An electron-transfer reaction at a graphite electrode covered by a thin film of an organic solvent that is immiscible with water, immersed into an aqueous electrolyte solution, is studied theoretically. The redox couple is confined within the film, and conductivity is achieved by the transfer of an anion of supporting electrolyte across the organic solvent/water interface. In linear scan voltammetry, the peak potential depends on the initial concentration of either the reactant or the anion of supporting electrolyte in the film. A critical value of the dimensionless kinetic parameter κ, which can be used to determine the standard rate constant, is calculated.

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