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US-2015380174-A1 · Dec 31, 2015 · US
Delafossite-type oxide for exhaust gas purification catalyst, and exhaust gas purification catalyst using same
US2020122129A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2020122129-A1 |
| Application number | US-201716473335-A |
| Country | US |
| Kind code | A1 |
| Filing date | Dec 22, 2017 |
| Priority date | Dec 27, 2016 |
| Publication date | Apr 23, 2020 |
| Grant date | — |
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Abstract
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In relation to a Cu-based delafossite-type oxide that is effective as an exhaust gas purification catalyst, Cu is placed in a high catalytic activity low-valence state, whereby a novel Cu-based delafossite-type oxide having higher activity than in the past is provided. Proposed is a delafossite-type oxide for an exhaust gas purification catalyst that is represented by a general formula ABO2, wherein Cu and Ag are contained in the A site of the general formula, one or two or more elements selected from the group consisting of Mn, Al, Cr, Ga, Fe, Co, Ni, In, La, Nd, Sm, Eu, Y, V, and Ti are contained in the B site of the general formula, and Ag is contained at a ratio of 0.001 at. % or more and less than 20 at. % in the A site of the general formula.
First claim
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1 . A delafossite-type oxide for an exhaust gas purification catalyst, represented by a general formula ABO 2 , wherein Cu and Ag are comprised in the A site of the general formula, one or two or more elements selected from the group consisting of Mn, Al, Cr, Ga, Fe, Co, Ni, In, La, Nd, Sm, Eu, Y, V, and Ti are comprised in the B site of the general formula, and Ag is comprised at a ratio of 0.001 at. % or more and less than 20 at. % in the A site of the general formula. 2 . The delafossite-type oxide for an exhaust gas purification catalyst according to claim 1 , wherein one or two or more elements selected from the group consisting of Mn, Al, Cr, and Ga are comprised in the B site of the general formula. 3 . The delafossite-type oxide for an exhaust gas purification catalyst according to claim 1 , wherein only Mn is comprised in the B site of the general formula, or Mn and one or two or more elements selected from the group consisting of Al, Cr, and Ga are comprised in the B site of the general formula. 4 . The delafossite-type oxide for an exhaust gas purification catalyst according to claim 1 , wherein Mn and one or two or more elements selected from the group consisting of Al, Cr, and Ga are comprised in the B site of general formula, and the atomic ratio of the content of Mn to the total content of Al, Cr, and Ga in the B site of the general formula is 10:90 to 90:10. 5 . An exhaust gas purification catalyst, comprising the delafossite-type oxide according to claim 1 and an inorganic porous material. 6 . An exhaust gas purification catalyst, having a configuration in which the exhaust gas purification catalyst according to claim 5 is supported on a substrate made of metal or ceramics.
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Classifications
Alumina · CPC title
Precipitation · CPC title
used in catalytic reactors · CPC title
- B01J23/8926Primary
Copper and noble metals · CPC title
Three-way catalysts · CPC title
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- What does patent US2020122129A1 cover?
- In relation to a Cu-based delafossite-type oxide that is effective as an exhaust gas purification catalyst, Cu is placed in a high catalytic activity low-valence state, whereby a novel Cu-based delafossite-type oxide having higher activity than in the past is provided. Proposed is a delafossite-type oxide for an exhaust gas purification catalyst that is represented by a general formula ABO2, wh…
- Who is the assignee on this patent?
- Mitsui Mining & Smelting Co
- What technology area does this patent fall under?
- Primary CPC classification B01J23/8926. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Apr 23 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).