| 摘要 |
<p>The invention is concerned with a catalyst for the removal of pollutants from the exhaust gases of automotive internal combustion engines wherein the catalyst is alumina doped with cations of two groups of metals M and M' being present in a quantity in the range 10 to 25% by weight of the catalyst and the weight ratio of M: M' lies in the range 0.5-2.0.</p> |
