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

摘要

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.

主权项

1. Method for preparing platinum particles being functionalized by polymers comprising at least one repeating unit bearing at least one proton-conducting group and being covalently bonded to a carbon material, said method comprising the following consecutive steps:
a) a step of contacting platinum particles with a compound that is an initiator for ATRP polymerization, which compound comprising a disulfide group —S—S— forming a bridge between two portions of said compound, said two portions being identical and comprising a phenyl group bearing an amide group —NH—CO—R1, R1 being a hydrocarbon group having at least one halogen atom, whereby particles, onto which a radical of said initiator compound is grafted, are obtained; b) a step of contacting said particles obtained in a) with at least one monomer meeting the following formula (II): in which: —Z corresponds to a phenyl group; and —E corresponds to a proton-conducting group, whereby there is polymerization of said monomer from the above-mentioned radicals.