CATALYST-SUPPORTING POWDER AND METHOD FOR PRODUCING SAME
The catalyst-supporting powder is in form of an agglomerate formed by agglomeration of a fluorine atom-containing polymer material, a catalyst metal, a cation exchange resin, and a carbon material and the polymer material is contained in the inside of the agglomerate.
1 . A catalyst-supporting powder being an agglomerate formed by agglomeration of a fluorine atom-containing polymer material, a catalyst metal, a cation exchange resin, and a carbon material, wherein said polymer material is contained in the inside of said agglomerate.
2 . The catalyst-supporting powder according to claim 1 , wherein said catalyst metal is located mainly on a site where a proton conductive passage of said cation exchange resin contacts said carbon material.
3 . The catalyst-supporting powder according to claim 1 , wherein the ratio of said polymer material to said carbon material is not lower than 10 mass % and not higher than 120 mass %.
4 . A production method of a catalyst-supporting powder, comprising;
a first step of producing a mixture of a fluorine atom-containing polymer material, a cation exchange resin, a carbon material, and a solvent;
a second step of obtaining a mixed powder of said polymer material, said cation exchange resin, and said carbon material by drying said mixture;
a third step of adsorbing a cation of a catalyst metal on a fixed ion of said cation exchange resin in said mixed powder; and
a fourth step of reducing said cation.
5 . A membrane electrode assembly for a polymer electrolyte fuel cell comprising the catalyst-supporting powder according to claim 1 .
6 . A membrane electrode assembly for a polymer electrolyte fuel cell comprising the catalyst-supporting powder according to claim 2 .
7 . A membrane electrode assembly for a polymer electrolyte fuel cell comprising the catalyst-supporting powder according to claim 3 .
8 . A membrane electrode assembly for a polymer electrolyte fuel cell comprising the catalyst-supporting powder obtained by the production method according to claim 4 .
9 . A polymer electrolyte fuel cell comprising the membrane electrode assembly for a polymer electrolyte fuel cell according to claim 5 .
10 . A polymer electrolyte fuel cell comprising the membrane electrode assembly for a polymer electrolyte fuel cell according to claim 6 .
11 . A polymer electrolyte fuel cell comprising the membrane electrode assembly for a polymer electrolyte fuel cell according to claim 7 .
12 . A polymer electrolyte fuel cell comprising the membrane electrode assembly for a polymer electrolyte fuel cell according to claim 8 .