ELECTRODEPOSITION OF COPPER ONTO POLYPYRROLE FILMS: APPLICATION TO PROTON REDUCTION

Imene Chikouche, Ali Sahari, Ahmed Zouaoui and Ameur Zegadi
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Imene Chikouche: Laboratoire Croissance et Caracterisation, de Nouveaux Semi-Conducteurs, Faculte de Technologie, University of Ferhat Abbas Setif 1, Setif 19000, Algeria
Ali Sahari: Laboratoire Croissance et Caracterisation, de Nouveaux Semi-Conducteurs, Faculte de Technologie, University of Ferhat Abbas Setif 1, Setif 19000, Algeria
Ahmed Zouaoui: Laboratoire Croissance et Caracterisation, de Nouveaux Semi-Conducteurs, Faculte de Technologie, University of Ferhat Abbas Setif 1, Setif 19000, Algeria
Ameur Zegadi: Laboratoire Croissance et Caracterisation, de Nouveaux Semi-Conducteurs, Faculte de Technologie, University of Ferhat Abbas Setif 1, Setif 19000, Algeria

Surface Review and Letters (SRL), 2016, vol. 23, issue 01, 1-7

Abstract: In this paper, we have electrodeposited copper on polypyrrole surface. Results show that at high applied cathodic potential (>−1.8V), copper electrodeposition occurs with difficulties. The amount of electrodeposited copper is low (1.32%) and it is limited by the low polypyrrole conductivity. At this potential, poor conductivity is caused by its insulating state. However, at an applied cathodic potential of −1.2V, the polypyrrole exhibits a relatively high conductivity and copper particles are electrodeposited with large amounts (12.44%) on polypyrrole/silicon system. At high applied cathodic potential, the SEM images show clearly dispersed grains of copper, but polypyrrole surface is less occupied. At an applied cathodic potential of −1.2V, the SEM image shows that polypyrrole surface is homogenously more occupied with copper. After copper deposition, the Cu/PPy/Si system is used to catalyze the hydrogen reaction. It was found that, once the deposited copper is present with considerable amounts, the proton reduction occurs easily. As for the polypyrrole conductivity, it was found that electrodeposited copper onto PPy/Si surface affect the total conductivity.

Keywords: Semiconductors; polymers; proton reduction; electropolymerization; interface (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1142/S0218625X15500869

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