Production of nanoporous films
US-2020208287-A1 · Jul 2, 2020 · US
Catalyst for oxygen reduction reaction and oxygen evolution reaction and method for manufacturing of the same
US11123717B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11123717-B2 |
| Application number | US-201916535495-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 8, 2019 |
| Priority date | May 30, 2019 |
| Publication date | Sep 21, 2021 |
| Grant date | Sep 21, 2021 |
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- Title
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Abstract
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Disclosed is a catalyst for oxygen reduction and evolution reactions. The catalyst is in the form of nickel sulfide (NiS 2 ) nanosheets. NiS 2 molecules are cross-linked and oriented two-dimensionally in the NiS 2 nanosheets. Also disclosed is a method for producing the catalyst.
First claim
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What is claimed is: 1. A method for producing a catalyst for oxygen reduction and evolution reactions, comprising synthesizing a nickel hydroxide (Ni(OH) 2 ) nanosheet precursor in which Ni(OH) 2 molecules are cross-linked and oriented two-dimensionally, and reacting the Ni(OH) 2 nanosheet precursor with sulfur to synthesize nickel sulfide (NiS 2 ) nanosheets, wherein the synthesizing the Ni(OH) 2 nanosheet precursor comprises adding an ammonium solution to a solution of nickel acetate in deionized water to prepare a mixed solution. 2. The method according to claim 1 , further comprising subjecting the mixed solution to hydrothermal synthesis. 3. The method according to claim 2 , further comprising cleaning with a cleaning liquid and drying after the hydrothermal synthesis. 4. The method according to claim 2 , wherein the hydrothermal synthesis is performed at 160 to 210° C. 5. The method according to claim 1 , wherein the ammonium solution is added in such an amount that the pH of the mixed solution is 9 to 11. 6. The method according to claim 1 , wherein the NiS 2 nanosheets are synthesized by annealing the sulfur and reacting the resulting sulfur vapor with the Ni(OH) 2 nanosheet precursor. 7. The method according to claim 6 , wherein the NiS 2 nanosheets are synthesized by reaction of the Ni(OH) 2 nanosheet precursor and the sulfur in a molar ratio of 1:5-25. 8. The method according to claim 6 , wherein the annealing is performed at 350 to 550° C.
Assignees
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Classifications
Energy storage using batteries · CPC title
Manufacture or treatment of nanostructures · CPC title
Heat treatment, e.g. drying, baking · CPC title
- H01M4/90Primary
Selection of catalytic material · CPC title
- H01M12/08Primary
composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type · CPC title
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- What does patent US11123717B2 cover?
- Disclosed is a catalyst for oxygen reduction and evolution reactions. The catalyst is in the form of nickel sulfide (NiS 2 ) nanosheets. NiS 2 molecules are cross-linked and oriented two-dimensionally in the NiS 2 nanosheets. Also disclosed is a method for producing the catalyst.
- Who is the assignee on this patent?
- Univ Korea Res & Bus Found
- What technology area does this patent fall under?
- Primary CPC classification H01M4/90. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 21 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).