The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 15, 2020
Filed:
Feb. 17, 2010
Xinsheng Liu, Edison, NJ (US);
YE Liu, Holmdel, NJ (US);
Pascaline Harrison Tran, Holmdel, NJ (US);
Michael P. Galligan, Cranford, NJ (US);
Wenyong Lin, Edison, NJ (US);
Keshavaraja Alive, South Plainfield, NJ (US);
Xinsheng Liu, Edison, NJ (US);
Ye Liu, Holmdel, NJ (US);
Pascaline Harrison Tran, Holmdel, NJ (US);
Michael P. Galligan, Cranford, NJ (US);
Wenyong Lin, Edison, NJ (US);
Keshavaraja Alive, South Plainfield, NJ (US);
BASF Corporation, Florham Park, NJ (US);
Abstract
Catalyst articles comprising palladium and related methods of preparation and use are disclosed. Disclosed is a catalyst article comprising a first catalytic layer formed on a substrate, wherein the first catalytic layer comprises palladium impregnated on a ceria-free oxygen storage component and platinum impregnated on a refractory metal oxide, and a second catalytic layer formed on the first catalytic layer comprising platinum impregnated on an oxygen storage component and rhodium impregnated on a zirconia-coated or yttria-coated alumina. The palladium component of the catalyst article is present in a higher proportion relative to the other platinum group metal components. The catalyst articles provide improved reductions in NOx in exhaust gases, particularly after lean-rich aging.