TRANSPORT OF ELECTROACTIVE SPECIES FE-2+ THROUGH THIN-FILMS OF VANADIUM HEXACYANOFERRATE

It is demonstrated that the electroactive species Fe~(2+) ion can transport easily through the thin films of vanadium hexacyanoferrate (VHF) to the underlaying glassy carbon (GC)electrode surface to be oxidized directly at less positive potential and that it can also be oxidized at the film at more positive potential through the media- tion of redox sites in the film. These two processes yield sequentially clearly distinguished first and second wave in stationary current-potential curves resulting...