| 摘要 |
An exhaust gas purifying catalyst which exhibits sufficient efficiency during low temperature operation (below 400° C.) such as starting of a vehicle or idling operation can be provided by improving activation of a noble metal itself and preventing reduction of activation at high temperatures. In the catalyst, Pd is supported on a complex oxide having the ratio formula of Ln<SUB>1-a</SUB>X<SUB>a</SUB>Al<SUB>1-b</SUB>Z<SUB>b</SUB>O<SUB>3 </SUB>(Ln: rare earth element, X: alkali earth metal, Z: 2 to 5 group or 12 to 14 group element, 0.02<=a<=0.30, 0.02<=b<=0.30).
|
