Process for preparing catalyst material

C - Chemistry – Metallurgy – 25 – D

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C25D 9/02 (2006.01) H01M 4/88 (2006.01) H01M 4/90 (2006.01)

Patent

CA 2644894

The present invention is intended to provide a catalyst material that supports active species densely, thereby having higher catalytic performance and serviceability as, for example, an electrode for fuel cells. To achieve the above object, the present invention provides a process for preparing a catalyst material, including: an electrochemical polymerization step of electrochemically polymerizing a heteromonocyclic compound so that the surface of a conductive material is coated with polynuclear complex molecules derived from the heteromonocyclic compound; and a metallation step of coordinating a catalytic metal to the coating layer of the polynuclear complex molecules, characterized in that the potential applied in the electrochemical polymerization is 0.8 to 1.5 V.

Cette invention vise à produire un matériau catalytique qui comporte une certaine densité d'espèce active, ce qui améliore ses performances catalytiques et sa fonctionnalité, par exemple, comme électrode pour piles à combustible. Pour produire ce matériau, on fait appel à un procédé de préparation de matériau catalytique qui comprend: une étape de polymérisation électrochimique d'un composé hétéromonocyclique permettant de recouvrir la surface d'un matériau conducteur de molécules complexes polynucléaires dérivées du composé hétéromonocyclique; et une étape de métallation qui consiste à coordiner un métal catalytique à la couche de revêtement des molécules complexes polynucléaires, lequel procédé se caractérise en ce que le potentiel appliqué lors de la polymérisation électrochimique est compris entre 0,8 et 1,5V.

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