Patent ID: 8318382

Claim:
An electrode for a fuel cell, comprising: a catalyst layer comprising a reduction-oxidation metal catalyst or a carrier formed with reduction-oxidation metal catalyst, and a proton conductive inorganic oxide coat formed on at least part of the reduction-oxidation metal catalyst or the carrier formed with reduction-oxidation metal catalyst, the proton conductive inorganic oxide coat containing an oxide superacid, the oxide superacid having an acidity function of Hammett H 0 of not less than −20.00 and not more than −11.93, the oxide superacid containing an oxide containing an element X and an oxide containing an element Y, the oxide containing the element X and the oxide containing the element Y being chemically bonded, wherein: the element X is at least one element selected from the group consisting of Titanium, Zirconium and Tin, and the element Y is at least one element selected from the group consisting of Tungsten and Molybdenum.