Exhaust gas purification catalyst, exhaust gas purification monolith catalyst, and method for producing exhaust gas purification catalyst
US-9352301-B2 · May 31, 2016 · US
Perovskite based oxygen storage materials
US9962654B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9962654-B2 |
| Application number | US-201615044444-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 16, 2016 |
| Priority date | Feb 16, 2016 |
| Publication date | May 8, 2018 |
| Grant date | May 8, 2018 |
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- Title
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Abstract
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The present technology relates to perovskite materials for oxygen storage. In one aspect, the perovskite material includes at least one platinum group metal (PGM) and at least one perovskite compound selected from the group consisting of formula (a): La x MO 3 and formula (b): La (1-y) Sr y MO 3 , wherein: M is selected from the group consisting of Co, Cu, Fe, Mn and Ni; x is about 0.7 to about 1.1; and y is 0 to about 0.8, and wherein M, x, and y are independently variable for each one of said perovskite compounds. In one exemplary method, the perovskite materials of the technology are employed to treat automotive exhaust gas. In one embodiment, the perovskite materials are included in the washcoat of an automotive catalytic converter.
First claim
Opening claim text (preview).
What is claimed is: 1. A perovskite material, useful for oxygen storage for a three-way catalyst, comprising at least one platinum group metal (PGM) and at least one perovskite compound selected from the group consisting of formula (a): La x FeO 3 and formula (b): La (1-y) Sr y FeO 3 , wherein: x is about 0.7 to about 1.1; and y is 0 to about 0.8, wherein x and y are independently variables for each one of said perovskite compounds. 2. The perovskite material of claim 1 , wherein said PGM is selected from the group consisting of Pt, Pd, and Rh. 3. The perovskite material of claim 2 , wherein said PGM is at least one of Pd and Rh. 4. The perovskite material of claim 1 , wherein at least one of said perovskite compound has a formula of La x FeO 3 , wherein x is about 0.9 to about 1. 5. The perovskite material of claim 1 , wherein said perovskite compound has a formula of La 0.9 FeO 3 , La 0.6 Sr 0.4 FeO 3 , or La 0.8 Sr 0.2 FeO 3 . 6. The perovskite material of claim 1 , wherein said perovskite compound has a formula of La (1-y) Sr y FeO 3 and y is about 0.2 to about 0.4. 7. The perovskite material of claim 1 , wherein said perovskite compound includes La x FeO 3 . 8. The perovskite material of claim 1 , wherein the perovskite compound has a formula of La 0.6 Sr 0.4 FeO 3 . 9. The perovskite material of claim 1 , wherein the perovskite compound has a formula of La 0.8 Sr 0.2 FeO 3 . 10. An automotive catalytic converter comprising a washcoat, wherein the washcoat comprises at least one perovskite material having at least one platinum group metal (PGM) and at least one perovskite compound selected from the group consisting of formula (a): La x FeO 3 and formula (b): La (1-y) Sr y FeO 3 , wherein: x is about 0.7 to about 1.1; and y is 0 to about 0.8, wherein x and y are independently variables for each one of said perovskite compounds. 11. The automotive catalytic converter of claim 10 , wherein said washcoat comprises a plurality of distinct perovskite materials. 12. The perovskite material of claim 10 , wherein said washcoat comprises a plurality of distinct perovskite compounds. 13. The automotive catalytic converter of claim 10 , wherein said PGM is selected from the group consisting of Pt, Pd, and Rh. 14. The automotive catalytic converter of claim 13 , wherein said PGM is at least one of Pd and Rh. 15. The automotive catalytic converter of claim 10 , wherein the at least one of said perovskite compound has a formula of La x FeO 3 , wherein x is about 0.9 to about 1. 16. The automotive catalytic converter of claim 10 , wherein said perovskite compound has a formula of La (1-y) Sr y FeO 3 and y is about 0.2 to about 0.4. 17. The automotive catalytic converter of claim 10 , wherein the perovskite compound has a formula of La 0.9 FeO 3 . 18. The automotive catalytic converter of claim 10 , wherein the perovskite compound has a formula La 0.6 Sr 0.4 FeO 3 . 19. The automotive catalytic converter of claim 10 , wherein said perovskite compound has a formula of La 0.8 Sr 0.2 FeO 3 .
Assignees
Inventors
Classifications
with alkali or alkaline earth metals · CPC title
- B01J23/894Primary
with rare earths or actinides · CPC title
Manganese · CPC title
Mixed oxides other than spinels, e.g. perovskite · CPC title
O2-storage component incorporated in the catalyst · CPC title
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Frequently asked questions
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- What does patent US9962654B2 cover?
- The present technology relates to perovskite materials for oxygen storage. In one aspect, the perovskite material includes at least one platinum group metal (PGM) and at least one perovskite compound selected from the group consisting of formula (a): La x MO 3 and formula (b): La (1-y) Sr y MO 3 , wherein: M is selected from the group consisting of Co, Cu, Fe, Mn and Ni; x is about 0.7 to abou…
- Who is the assignee on this patent?
- Gm Global Tech Operations Llc
- What technology area does this patent fall under?
- Primary CPC classification B01J23/894. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue May 08 2018 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).