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Delafossite-type oxide for exhaust gas purification catalyst, and exhaust gas purification catalyst using same
US11110439B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11110439-B2 |
| Application number | US-201716473335-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 22, 2017 |
| Priority date | Dec 27, 2016 |
| Publication date | Sep 7, 2021 |
| Grant date | Sep 7, 2021 |
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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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The invention claimed is: 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, only Mn is comprised in the B site of the general formula, or Mn and one or more elements selected from the group consisting of Al, Cr, and Ga 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. An exhaust gas purification catalyst, comprising the delafossite-type oxide according to claim 1 and an inorganic porous material. 3. An exhaust gas purification catalyst, having a configuration in which the exhaust gas purification catalyst according to claim 2 is supported on a substrate made of metal or ceramics. 4. 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, Mn and one or more elements selected from the group consisting of Al, Cr, and Ga are comprised in the B site of general formula, 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, 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. The delafossite-type oxide according to claim 4 , wherein 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 50:50 to 80:20. 6. An exhaust gas purification catalyst, comprising the delafossite-type oxide according to claim 4 and an inorganic porous material. 7. An exhaust gas purification catalyst, having a configuration in which the exhaust gas purification catalyst according to claim 6 is supported on a substrate made of metal or ceramics.
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Classifications
Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties · CPC title
characterised by their crystalline properties, e.g. semi-crystalline (catalysts comprising carbon B01J21/18; molecular sieves B01J29/00) · CPC title
X-ray diffraction · CPC title
characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77) · CPC title
Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths · CPC title
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- What does patent US11110439B2 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?
- Univ Akita, 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 Tue Sep 07 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).