Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Centre National De La Recherche Scientifique

Christophe Coutanceau

Pierrick Buvat

Anne-Claire Ferrandez

Steve Baranton

Delphine Dru

Janick Bigarré

Stève Baranton

Steve Barenton

A specific method for preparing platinum particles grafted with proton-conducting polymers and use of these particles as catalysts for oxygen reduction.

Method for producing proton-conducting platinum particles with a large active surface area and surface-grafted with specific, proton-conducting polymers

The invention relates to a method for preparing particles comprising a material capable of catalyzing the reduction of oxygen or the oxidation of hydrogen, said particles being functionalized by polymers comprising at least one repeating unit bearing at least one proton-conducting group, and said particles being covalently bonded to a carbon material, said method comprising: a step a) of contacting particles, comprising a material capable of catalyzing the reduction of oxygen or the oxidation of hydrogen, with a polymer comprising at least one repeating unit bearing at least one proton-conducting group and comprising at least one portion corresponding to an organic radical of a compound that is an initiator for ATRP polymerization, said radical comprising at least one group capable of being grafted onto the surface of said particles, whereby particles, onto which polymers comprising at least one repeating unit bearing at least one proton-conducting group are grafted, are obtained.

Method for preparing proton-conducting particles capable of catalyzing the reduction of oxygen or the oxidation of hydrogen by grafting proton-conducting polymers to the surface of the particles

A method for preparing particles includes a material capable of catalyzing the reduction of oxygen or the oxidation of hydrogen, the particles being functionalized by polymers including at least one repeating unit bearing at least one proton-conducting group, and the particles being covalently bonded to a carbon material. The method includes the following consecutive steps: a) a step of contacting particles, comprising a material capable of catalyzing the reduction of oxygen or the oxidation of hydrogen, with a compound that is an initiator for ATRP polymerization, the compound comprising at least one group capable of being grafted onto the surface of the particles, whereby particles, onto which a radical of the initiator compound is grafted, are obtained; and b) a step of contacting the particles obtained in a) with at least one monomer having at least one proton-conducting group, whereby the polymerization of the monomer from the above-mentioned radicals occurs.

Method for preparing proton-conducting particles capable of catalyzing the reduction of oxygen or the oxidation of hydrogen

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Poitiers, France

Christophe Coutanceau