Charge transfer in films of Prussian blue

Films of Prussian blue of different thicknesses are comprehensively studied in the presence of 0.1-1 M KCl at pH 2-4 by cyclic voltammetry, chronoampe rometry, and chronopotentiometry. Effect of the film thickness and the elec trolyte composition on voltammetric curves and chronopotentiograms is inves tigated. The conclusion is drawn that the charge transport in thick films o f Prussian blue is controlled by diffusion and migration. The chronoamperog rams are utilized to calculate effective diffusion coefficients for charge carriers at different film oxidation degrees.