Preparation method for wide-temperature catalyst used for preferential oxidation of co in a hydrogen-rich atmosphere, and product and applications
US-2019105638-A1 · Apr 11, 2019 · US
Oxygen evolution catalyst
US10879538B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10879538-B2 |
| Application number | US-201916262197-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 30, 2019 |
| Priority date | Feb 7, 2018 |
| Publication date | Dec 29, 2020 |
| Grant date | Dec 29, 2020 |
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- Title
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Abstract
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An oxygen evolution catalyst includes a core and a shell covering the surface of the core. The core includes ruthenium oxide or metal ruthenium in at least a surface portion. The shell includes titania or a composite oxide of titanium and ruthenium. Such an oxygen evolution catalyst is obtained by (a) dispersing core particles each including ruthenium oxide or metal ruthenium in at least a surface portion in a solvent to obtain a dispersion, (b) adding a Ti source to the dispersion to produce precursor particles in which the surface of each core particle is covered with a titania precursor, and (c) collecting the precursor particles from the dispersion and heat-treating the precursor particles after drying.
First claim
Opening claim text (preview).
What is claimed is: 1. An oxygen evolution catalyst comprising: a core; and a shell covering and fixed to a surface of the core, wherein the core includes ruthenium oxide or metal ruthenium in at least a surface portion, and the shell includes titania or a composite oxide of titanium and ruthenium. 2. The oxygen evolution catalyst according to claim 1 , wherein a titania coverage is 0.05 ML or more and 5.0 ML or less, the titania coverage being the number of titania atomic layers on the assumption that all of titanium included in the shell has become titania and that the titania uniformly covers the surface of the core. 3. A water electrolyzer comprising an oxygen electrode in which the oxygen evolution catalyst according to claim 1 is contained therein. 4. A fuel cell comprising an anode in which the oxygen evolution catalyst according to claim 1 is added thereto.
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Classifications
Compounds thereof with non-metallic elements · CPC title
at least one noble metal or noble metal oxide and at least one non-noble metal oxide · CPC title
Metals or alloys (H01M4/92 takes precedence) · CPC title
Fuel cells · CPC title
Hydrogen production from non-carbon containing sources, e.g. by water electrolysis · CPC title
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- What does patent US10879538B2 cover?
- An oxygen evolution catalyst includes a core and a shell covering the surface of the core. The core includes ruthenium oxide or metal ruthenium in at least a surface portion. The shell includes titania or a composite oxide of titanium and ruthenium. Such an oxygen evolution catalyst is obtained by (a) dispersing core particles each including ruthenium oxide or metal ruthenium in at least a surf…
- Who is the assignee on this patent?
- Toyota Chuo Kenkyusho Kk, Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/8657. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Dec 29 2020 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).