| 摘要 |
The object of the present invention is to provide a high-performance exhaust gas purifying catalyst that can achieve oxygen absorption/release capacity and NOx purification performance. The object is solved by an exhaust gas purifying catalyst, which comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure in the upstream part of the catalyst coating layer, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % of the total cation amount, and has a molar ratio of (cerium + the additional element) : (zirconium) of 43 : 57 to 48 : 52. |
| 申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA;CATALER CORPORATION;SUZUKI, HIROMASA;YOSHIDA, TAKERU;MIURA, MASAHIDE;CHINZEI, ISAO;OKADA, MITSUYOSHI;TANABE, TOSHITAKA;SUDA, AKIHIKO;ORI, HIROTAKA;CHIBA, AKIYA;IIZUKA, KOSUKE;MORIKAWA, AKIRA |
发明人 |
SUZUKI, HIROMASA;YOSHIDA, TAKERU;MIURA, MASAHIDE;CHINZEI, ISAO;OKADA, MITSUYOSHI;TANABE, TOSHITAKA;SUDA, AKIHIKO;ORI, HIROTAKA;CHIBA, AKIYA;IIZUKA, KOSUKE;MORIKAWA, AKIRA |
