Charge transfer between two immiscible electrolyte solutions Part III. Stationary curve of current vs. potential of electron transfer across interface

Abstract

An electron transfer reaction O1(w)+R2(n)R1(w)+O2(n) takes place at the boundary of two immiscible phases: the aqueous (w) and the non-aqueous (n) electrolyte solutions, between the redox couple O1/R1 in the aqueous phase and the redox couple O2/R2 in the non-aqueous phase, Using the stationary Nernst-diffusion layer treatment and neglecting the migration and adsorption effects the relationship between the current and the electrical potential difference across the interface has been derived and analysed. The stationary curve of current vs. potential has some unusual properties which result from the coupling of the first order mass transport process in each phase with the second order electron transfer reaction at the interface. The method has been suggested for the analysis of the curve of mean current vs. potential of the electron transfer reaction at the electrolyte dropping electrode.