Abstract
Conducting polypyrrole (PPY) films are deposited on platinum by chemical oxidation of pyrrole from acid solutions of H2O2, K2S2O8, K2Cr2O7, FeCl3 and Fe2(SO4)3. Cyclic voltammograms and charge–potential data are obtained for these PPY films in 0.1 M LiClO4 and 0.1 M Na2SO4 solutions. Chemically deposited PPY films are electrochemically active and yield oxidation–reduction peak potentials that are similar to those of PPY films electrochemically synthesized in solutions with the same anions. The shape of the cyclic current–potential curves and the charge–potential responses of the chemically deposited PPY depend on the bath composition. The bath determines the counter anion introduced into the PPY film. The physical appearance and thickness of a film depends on the deposition time, acidity and composition of the electroless plating baths.
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