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公开(公告)号：US20190321783A1
公开(公告)日：2019-10-24
申请号：US15958020
申请日：2018-04-20
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Ming Yang , Lei Wang , Shouxian Ren , Wei Li
Abstract: A nitrogen oxides (NOx) and hydrocarbon (HC) storage catalyst for treating an exhaust gas flow is provided. The NOx and HC storage catalyst includes (a) a zeolite, (b) noble metal atoms, and (c) a metal oxide, a non-metal oxide, or a combination thereof. One or more of the noble metal atoms is present in a complex with the metal oxide, the non-metal oxide or a combination thereof. The complex is dispersed within a cage of the zeolite. Methods of preparing the NOx and HC storage catalyst and methods of using the NOx and HC storage catalyst for treating an exhaust gas stream flowing from a vehicle internal combustion engine during a period following a cold-start of the engine are also provided.
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公开(公告)号：US20190257232A1
公开(公告)日：2019-08-22
申请号：US15902464
申请日：2018-02-22
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Ming Yang , Ryan J. Day , Xingcheng Xiao , Gongshin Qi , Wei Li
Abstract: Bimetallic oxidation catalyst devices include a support body, one or more metal A bulk deposits disposed on the support body, and a plurality of metal B atomic clusters disposed on the surface of each of the metal A bulk deposits. Metal A and metal B are different metals each selected from the group consisting of platinum group metals (PGM), Ag, Au, Ni, Co, and Cu, and substantially no metal B is deposited on the support body. At least 85% by weight of the metal B atomic clusters comprise up to 10 atoms and the maximum metal B atomic cluster size is 200 metal B atoms. The combined loading of metal A and metal B can be less than 1.5% by weight relative to the weight of the support body. Metal A can include Pd, Rh, Rh, or Pd, and metal B can include Pt, Pt, Ag, or Ag.
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公开(公告)号：US20180185832A1
公开(公告)日：2018-07-05
申请号：US15399179
申请日：2017-01-05
Applicant: GM Global Technology Operations LLC
Inventor： Xingcheng Xiao , Gongshin Qi , Ryan J. Day , Ming Yang
CPC classification number: B01J37/035 , B01J23/42 , B01J23/44 , B01J35/0013 , B01J35/0086 , B01J37/08 , B01J37/18
Abstract: Catalyst systems that are resistant to high-temperature sintering and methods for preparing such catalyst systems that are resistant to sintering at high temperatures are provided. Methods of forming such catalyst systems include contacting a support having a surface including a catalyst particle with a solution comprising a metal salt and having an acidic pH. The metal salt is precipitated onto the surface of the support. Next, the metal salt is calcined to selectively generate a porous coating of metal oxide on the surface of the support distributed around the catalyst particle.
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公开(公告)号：US20180111112A1
公开(公告)日：2018-04-26
申请号：US15334109
申请日：2016-10-25
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Ming Yang , Ryan J. Day , Se H. Oh , Gongshin Qi , Wei Li
CPC classification number: B01J23/78 , B01D53/944 , B01D53/945 , B01D2255/1021 , B01D2255/2022 , B01D2255/2092 , B01J37/0215 , B01J37/0236 , B01J37/024 , B01J37/08 , F01N3/2807 , F01N2370/02
Abstract: A catalytic converter includes a catalyst. The catalyst includes a non-modified metal oxide support and platinum group metal (PGM) complexes atomically dispersed on the non-modified metal oxide support. The PGM complexes include a PGM species selected from the group consisting of an atom of a platinum group metal, a cluster including from 2 atoms to less than 10 atoms of the platinum group metal, and combinations thereof. An alkali metal or an alkaline earth metal is bonded to the PGM species. The alkali or alkaline earth metal is part of a structure including oxygen atoms and hydrogen atoms.
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