Article ID Journal Published Year Pages File Type
10267068 Electrochemistry Communications 2005 7 Pages PDF
Abstract
The kinetics of the ion transfer across the liquid|liquid interface is studied by means of a thin film-modified electrode in combination with square-wave voltammetry. The thin film-modified electrode consists of an edge plane pyrolytic graphite electrode covered with a thin film of a water immiscible electroinactive organic solvent containing a neutral redox probe and a suitable electrolyte. The overall electrochemical process, proceeding as a coupled electron-ion transfer reaction, is controlled either by the electron transfer across the graphite electrode|organic solvent or by the ion transfer across the organic solvent|aqueous electrolyte interface. The theoretical model enabling to distinguish the rate limiting step is developed. The theory is used to measure the kinetics of ClO4-,NO3-, Cl−, SCN−, Na+, K+, (CH3)4N+, and (C4H9)4N+ across the water|nitrobenzene interface utilizing lutetium bis(tetra-tert-butylphthalocyaninato) as a redox probe.
Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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