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:
Apr. 08, 2025
Filed:
May. 20, 2022
Applicant:
GM Global Technology Operations Llc, Detroit, MI (US);
Inventors:
Yuntao Gu, Farmington Hills, MI (US);
Gongshin Qi, Troy, MI (US);
Jiazhi Hu, Troy, MI (US);
Wei Li, Troy, MI (US);
Assignee:
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J 23/63 (2006.01); B01D 53/94 (2006.01); B01J 21/04 (2006.01); B01J 35/23 (2024.01); B01J 35/61 (2024.01); B01J 35/63 (2024.01); B01J 37/02 (2006.01); F01N 3/28 (2006.01);
U.S. Cl.
CPC ...
B01J 23/63 (2013.01); B01D 53/945 (2013.01); B01J 21/04 (2013.01); B01J 35/23 (2024.01); B01J 35/613 (2024.01); B01J 35/615 (2024.01); B01J 35/633 (2024.01); B01J 35/635 (2024.01); B01J 35/638 (2024.01); B01J 37/0207 (2013.01); B01J 37/0213 (2013.01); B01J 37/0228 (2013.01); B01J 37/0236 (2013.01); B01J 37/0242 (2013.01); B01J 37/0244 (2013.01); F01N 3/2803 (2013.01); F01N 3/2842 (2013.01); B01D 2255/1025 (2013.01); B01D 2255/2065 (2013.01); B01D 2255/9025 (2013.01); B01D 2255/9205 (2013.01); B01D 2255/9207 (2013.01); F01N 2370/02 (2013.01);
Abstract
A layered catalyst structure for purifying an exhaust gas stream includes a catalyst support and a rhodium catalyst layer including an atomic dispersion of rhodium ions and/or rhodium atoms adsorbed on an exterior surface of the catalyst support. The catalyst support includes an alumina substrate, a first ceria layer disposed on and extending substantially continuously over the alumina substrate, and a second colloidal ceria layer formed directly on the first ceria layer over the alumina substrate.