| 简介 |
PROBLEM TO BE SOLVED : To provide an exhaust gas purifying catalyst which can maintain the performance of the catalyst over a long time even in a high temperature atmosphere and materialize excellent exhaust gas purification performance. SOLUTION : The exhaust gas purifying catalyst contains a noble metal, a perovskite type complex oxide expressed by formula (3) : AB1-mNmO3(wherein A shows at least one element selected from rare earth elements and alkaline earth metals; B shows at least one element selected from rare earth elements, transition elements excluding noble metals, and Al; N shows a noble metal; and m shows the atomic ratio of N in the numerical range of 0COPYRIGHT : (C)2004, JPO&NCIPI |
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