| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the cleaning capacity in a low-temperature range and the heat resistance of a NH<SB>3</SB>-oxidation catalyst 4 disposed downstream of a NOx catalyst 3 of the selective reduction type. <P>SOLUTION: The NH<SB>3</SB>-oxidation catalyst 4 is structured to include Ce-Pr complex oxide particles wherein Ce, Pr, and catalytic metal are combined to form oxide particles with at least a part of each of Ce oxide and Pr oxide mutually dissolved in the solid state and the catalytic metal dissolved in the solid state to the oxide particles. <P>COPYRIGHT: (C)2010,JPO&INPIT |
