| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel catalyst which can improve the efficiency of a catalyst metal to reduce NOx in the exhaust gas of an internal combustion engine. SOLUTION: In the catalyst, at least one kind of element selected from the group consisting of iridium, platinum, rhodium, palladium, silver, cobalt, copper, nickel, iron, magnesium, and lanthanoid, in catalytically active quantities, is carried on and/or in carrier particles comprising metal oxides and/or composite oxides in an evenly dispersed state. |
