| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the low temperature activity (light-off performance) of a ternary catalyst including hollow oxides. <P>SOLUTION: At least two catalyst layers are formed on a cell wall of a honeycomb carrier, solid oxide powder carrying catalyst metal is arranged at the upper layer, and hollow ceria based or alumina based oxide powder carrying catalyst metal is arranged at the lower layer. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
