CATALYST FOR SELECTIVELY OXIDIZING CARBON MONOXIDE, METHOD FOR DECREASING CARBON MONOXIDE CONCENTRATION AND FUEL CELL SYSTEM

摘要

PPROBLEM TO BE SOLVED: To provide a catalyst for selectively oxidizing carbon monoxide, which is obtained by depositing Ru and Pt on a carrier and in which the movement of Pt from the surface of the carrier, a loss of the deposited amount of Pt or the disappearance of an eggshell structure is restrained when the catalyst for selectively oxidizing carbon monoxide is treated in a basic solution and to provide a method for decreasing the carbon monoxide concentration by using the catalyst for selectively oxidizing carbon monoxide and selectively oxidizing the carbon monoxide in a gaseous raw material comprising carbon monoxide and hydrogen. PSOLUTION: The catalyst for selectively oxidizing carbon monoxide comprises the Ru and Pt deposited on the carrier consisting of an inorganic oxide comprising at least one selected from alumina, silica, zirconia and titania and is characterized in that Pt is deposited on the carrier in the basic solution by using HSB2/SBPt(OH)SB6/SBas a Pt source. PCOPYRIGHT: (C)2009,JPO&INPIT