Electrocatalytic reduction of proton on polypyrrole coatings onto aluminium modified by the electrochemical cementation process

Strongly adherent and smooth polypyrrole coatings were formed at constant current density on aluminium sheet from aqueous solutions of pyrrole and oxalic acid. A new method (cementation) of formation of modified polypyrrole containing dispersed three-dimensional array of copper is presented. These films were investigated by scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX). The electrocatalytic effect toward proton reduction was observed on the modified electrode. (C) 2000 Elsevier Science S.A. All rights reserved.