Electrochemical behaviour of Nafion (R)+cupromeronic phthalocyanine films

The surface of indium tin oxide (ITO) and graphite+polymer composite electr odes can be modified by Nafion(R) films containing a little amount of dispe rsed electroactive substances, such as phthalocyanines. This procedure allo ws electroanalytical information on the electroactive deposited substance t o be obtained. The preparative methods of these type of modified electrodes are discussed from voltammetric results in this work. The proposed equival ent circuit explains the voltammetric differences between these electrodes. The Nafion(R) net acts as a permeable membrane to the hydrogen ions. Besid es, the presence of methylviologen within the Nafion(R) film makes the elec tron transport throughout this membrane easy. (C) 1999 Elsevier Science Ltd . All rights reserved.