| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a catalyst for purifying an exhaust gas capable of controlling the phosphorus poisoning of a catalyst coating layer, applied to an engine driven in the presence of a phosphorus, to a fully satisfactory level. <P>SOLUTION: The catalyst for purifying an exhaust gas, in which the surface of the catalyst coating layer of a ternary catalyst is coated with an oxide material, has a specific surface area of the oxide material of 9 m<SP>2</SP>/g or less and a coating amount from 10 to 40 g/L. In addition, the catalyst contains at least one of ceria, zirconia, and alumina. <P>COPYRIGHT: (C)2011,JPO&INPIT |
