07795172 is referenced by 27 patents and cites 44 patents.

A layered exhaust treatment catalyst comprising: (a) a carrier such as cordierite; (b) a first layer deposited on the carrier comprising a palladium metal component, a platinum metal component and an oxygen storage component such as ceria supported on a refractory metal oxide such as gamma-alumina; and (c) a second layer deposited on the first layer comprising a rhodium metal component, a platinum metal component and an oxygen storage component such as ceria supported on a refractory metal oxide such as gamma-alumina. Preferably, the catalyst also includes a bottom layer interposed between the carrier and the first layer. The bottom layer comprises an oxygen storage component such as ceria supported on a refractory metal oxide such as gamma-alumina. The amount of the oxygen storage component of the catalyst may be “tuned”, i.e., adjusted, to meet the needs of a vehicle's on-board diagnostic (“OBD”) catalyst efficiency monitoring system, without adversely affecting the performance of the catalyst.

Title
Layered exhaust treatment catalyst
Application Number
10/874051
Publication Number
7795172 (B2)
Application Date
June 22, 2004
Publication Date
September 14, 2010
Inventor
Zhicheng Hu
Edison
NJ, US
John S Foong
Piscataway
NJ, US
Agent
Drinker Biddle & Reath
Bronwen M Loeb
Assignee
BASF Corporation
NJ, US
IPC
B01J 29/00
B01J 20/00
B01J 21/00
B01J 23/00
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