| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an exhaust gas purifying catalyst developing sufficient catalytic performance of a noble metal even at low temperature, by suppressing a tendency of a metal oxide support to impart an oxidative property to the noble metal, and to provide a process for producing it. <P>SOLUTION: The present invention is for an exhaust gas purifying catalyst with a noble metal (Pt) and an oxide of a second metal or semimetal (MO<SB>x</SB>) supported on a metal oxide support (CeO<SB>2</SB>) mainly constituted of an oxide of one or more first metals or semimetals; as well as a process for producing it. The second metal or semimetal has an electronegativity larger than that of the first metals or semimetals, and is selected among the group consisting of metals and semimetals excluding platinum-group metals and gold. <P>COPYRIGHT: (C)2008,JPO&INPIT |
