Kinetic data for the hexacyanoferrate (II)/(III) couple on platinum electrode in various chlorides of monovalent cations

An experimental study of the hexacyanoferrate (II)/(III) couple at a platinum disc electrode in hydrochloric acid, in alkali metal, ammonium and tetraalkylammonium chlorides solutions is carried out. Diffusion coefficients, equilibrium potentials and transfer rate constants are determined. Our results complete those previously published and clearly show a correlation between the magnitude of the apparent charge transfer rate constant and the extent of cation association with both hexacyanoferrate (II) and (III) anions