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. 20, 2022
Filed:
Jun. 18, 2020
Applicant:
GM Global Technology Operations Llc, Detroit, MI (US);
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 21/04 (2006.01); B01J 21/06 (2006.01); B01J 23/42 (2006.01); B01J 23/46 (2006.01); B01J 35/00 (2006.01); B01J 37/02 (2006.01); F01N 3/10 (2006.01); F01N 3/28 (2006.01);
U.S. Cl.
CPC ...
B01J 23/464 (2013.01); B01J 23/42 (2013.01); B01J 35/006 (2013.01); B01J 37/0207 (2013.01); F01N 3/101 (2013.01); F01N 3/2807 (2013.01); B01J 21/04 (2013.01); B01J 21/066 (2013.01); F01N 2370/02 (2013.01);
Abstract
Bimetallic three-way catalyst devices include a support body, one or more Rh bulk deposits disposed on the support body, and a plurality of Pt atomic clusters disposed on the surface of each of the Rh bulk deposits. Substantially no Pt is deposited on the support body. At least 85% by weight of the Pt atomic clusters comprise up to 10 atoms and the maximum Pt atomic cluster size is 200 Pt atoms. The combined loading of Rh and Pt can be less than 1.5% by weight relative to the weight of the support body. The molar ratio of Rh in a bulk Rh deposit to Pt disposed on the surface of that deposit is at least 5:1.