PROBE BEAM DEFLECTION STUDY OF THE ION-EX CHANGE BETWEEN PRUSSIAN BLUE FILM OR INDIUM HEXACYANOFERRATE FILM AND ELECTROLYTE-SOLUTIONS

Probe beam deflection(PBD) technique together with electrochemical tec hniques such as cyclic voltammetry was used to study the ion exchange in prussian blue(PB) film and its analogue indium hexacyanoferrate (In HCF) chemically modified electrodes, The ion exchange mechanism of PB was verified as following: K2Fe2+FeI(CN)(6)(-e--K+)reversible row(+e-K+)KFe(3+)Fe(I)(CN)(6)(-xe--xK+)reversible arrow(+xe-+xK+) [Fe3+FeI(CN )(6)](x)[KFe3+FeI(CN)(6)](1-x) where on reduction in contact with an a cidic KCl electrolyte, H+ enter PB film before K+. Both the cations an d anions participate concurrently in the redox process of InHCF, meanw hile K+ ion plays a major role in the whole charge transfer process of this film with increasing radii of anions.