ELECTROCHEMISTRY OF METAL HEXACYANOFERRATES AND CONDUCTING POLYMERS BILAYER STRUCTURES DEPOSITED ON CONVENTIONAL SIZE ELECTRODES AND ULTRAMICROELECTRODES. Ⅰ. CONVENTIONAL SIZE MODIFIED ELECTRODES

摘要

Electrochemical preparation and characterization of hybrid inorganic-organic films consisting of iron (Ⅲ) hexacyanoferrate, well known as Prussian Blue (PB), and of organic conducting polymers, on a platinum electrode, are reported. The organic conducting polymers poly-[3,4-ethylenedioxythiophene] (PEDOT), polyazulene (PAZ) and poly -2-[(E) -2-azulen-1-ylvinyl] thiophene (PAVT) have been used for the preparation of hybrid films in various configurations, such as PB/PEDOT, PB/PAZ, and PB/PAVT. The PB/PEDOT coating is prepared electrochemically by a two-step method. Firstly, a PB layer is electrodeposited onto a platinum electrode in aqueous solution. In the second step, the electrochemical deposition of PEDOT film over the Pt/PB modified electrode was carried out. The PB/PAZ and PB/PAVT coatings have been prepared in a similar manner. Thereafter, the electrochemical behaviour and the stability of the hybrid coatings were studied in aqueous solutions. The electrochemical response of PB/PEDOT, PB/PAZ and PB/PAVT coatings is based mainly on the Prussian Blue/Everitt Salt redox wave.