| abstract |
To provide a catalyst having high activity and capable of maintaining its activity for a long time even in a high temperature environment. The present invention provides a catalyst in which a catalyst carrier made of a noble metal or a noble metal oxide is supported on a porous carrier made of one or more metal oxides. A catalyst comprising cluster particles formed by aggregation of noble metal atoms and ions of a second noble metal bonded to the cluster particles. Here, the first noble metal and the second noble metal are preferably different metal species, and the first noble metal and the second noble metal are platinum, palladium, rhodium, ruthenium, silver, gold, iridium, osmium. Any one is preferred. [Selection] Figure 1 |