Journal of the Brazilian Chemical Society
On-line version ISSN 1678-4790
MELKI, Tahar et al. Electrosynthesis and catalytic activity of polymer-nickel particles composite electrode materials. J. Braz. Chem. Soc. [online]. 2009, vol.20, n.8, pp. 1523-1534. ISSN 1678-4790. http://dx.doi.org/10.1590/S0103-50532009000800020.
Nickel-polymer composite electrode materials have been synthesized using various strategies, all comprising the electrochemical reduction of nickel(II) cations or complexes, incorporated by either ion-exchange or complexation into various poly(pyrrole-carboxylate) thin films coated by oxidative electropolymerization onto carbon electrodes. The electrocatalytic activity and the stability of the different composites have been then evaluated in the course of the electrocatalytic hydrogenation of ketones and enones in aqueous electrolytes. The best results were obtained using nickel-polymer composites synthesized by electroreduction of nickel(II) ions complexed into polycarboxylate films, which are characterized by a high catalytic activity and a good operational stability.
Keywords : functionalized polypyrrole; electrodeposition; polymer-metal nanocomposite; nickel; electrocatalytic hydrogenation.