| abstract |
The object of the present invention is to provide a catalyst that is highlynactive and capable of maintaining its activity for a long period of time even in anhigh-temperature environment. The present invention is a catalyst including:na porous carrier which is comprised of one kind of or two or more kinds ofnmetal oxides; and catalyst particles which are comprised of precious metals ornprecious metal oxides and supported on the above porous carrier,ncharacterized in that the catalyst particles include: clustered particles formednby the aggregation of first precious metal atoms; and second precious metalnions bound to the above clustered particles. Preferably, the first preciousnmetal and the second precious metal are different metal species which arenselected from the group consisting of platinum, palladium, rhodium, ruthenium,nsilver, gold, iridium and osmium. |