Electrochemical charging of indium hexacyanoferrate films in DMSO and acetonitrile water mixtures containing alkali metal cations

Indium hexacyanoferrate films were investigated in water- acetonitrile and water-dimethylsulfoxide mixtures containing various alkali metal cations. T he films, which were electrodeposited from the supporting electrolytes cont aining lithium cations, occurred to have fairly open structure permitting t he transport of alkali metal cations in the solutions (mixtures) rich in no naqueous solvents. The slopes of dependencies of formal potentials on the l ogarithms of concentrations of alkali metal cations were consistent with th e predominant involvement of countercations in the redox reactions. But in the cases when the content of non aqueous solvent was relatively high, the slopes were definitely lower than Nernstian (60 mV per cation activity deca de), thus implying a more complex mechanism of the reaction.