发明名称 |
Exhaust gas purifying catalyst |
摘要 |
Disclosed is an exhaust gas purifying catalyst, which comprises a CeZr-based composite oxide capable of maintaining a hollow structure to ensure an oxygen absorbing/ releasing capability, even after being exposed to high-temperature exhaust gas. The exhaust gas purifying catalyst comprises a honeycomb-shaped substrate, and a catalyst layer formed on a surface of the substrate. The catalyst layer contains a composite oxide which includes cerium (Ce) and zirconium (Zr) and has a hollow structure, and a catalytic metal supported by the composite oxide. The composite oxide having the hollow structure includes, in a state after being subjected to a thermal aging in Air at 1000°C for 24 hours, a particle with a shape having an outer diameter of 750 to 1000 nm and a shell thickness of 80 to 120 nm.
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申请公布号 |
EP1808219(A1) |
申请公布日期 |
2007.07.18 |
申请号 |
EP20070100039 |
申请日期 |
2007.01.03 |
申请人 |
TODA KOGYO CORPORATION;MAZDA MOTOR CORPORATION |
发明人 |
URAI, TOMOAKI;HONDA, TOMOHIRO;KURATA, KATSUAKI;IWAKUNI, HIDEHARU;TAKAMI, AKIHIDE |
分类号 |
B01D53/94;B01J21/06;B01J23/00;B01J23/10;B01J35/04;B01J35/08;F01N3/28 |
主分类号 |
B01D53/94 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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