Method for producing fuel cell electrode catalyst, fuel cell electrode catalyst, and uses thereof
US-2015093681-A1 · Apr 2, 2015 · US
Method for producing core-shell catalyst
US10232351B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10232351-B2 |
| Application number | US-201515515037-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 7, 2015 |
| Priority date | Oct 2, 2014 |
| Publication date | Mar 19, 2019 |
| Grant date | Mar 19, 2019 |
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Abstract
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To produce a core-shell catalyst with high catalytic activity for a short period of time. Disclosed is a method for producing a core-shell catalyst comprising a core containing palladium and a shell containing platinum and coating the core, the method comprising: supplying palladium-containing particles and a copper-containing material to an acid solution; stirring the acid solution with introducing an oxygen-containing gas into the acid solution; coating at least a part of a surface of the palladium-containing particles with copper by applying a potential that is nobler than the oxidation reduction potential of copper to the palladium-containing particles in a copper ion-containing electrolyte after the stirring; and then forming the shell by substituting the copper coating at least a part of the surface of the palladium-containing particles with platinum by bringing the palladium-containing particles into contact with a platinum ion-containing solution.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for producing a core-shell catalyst comprising a core containing palladium and a shell containing platinum and coating the core, the method comprising: a supplying step of supplying palladium-containing particles and a copper-containing material to an acid solution; a stirring step of stirring the acid solution with introducing an oxygen-containing gas into the acid solution to obtain a copper ion-containing electrolyte; a copper coating step of coating at least a part of a surface of the palladium-containing particles with copper by applying a potential that is nobler than the oxidation reduction potential of copper to the palladium-containing particles in the copper ion-containing electrolyte after the stirring step; and a substitution step of forming the shell by substituting the copper coating at least a part of the surface of the palladium-containing particles with platinum by bringing the palladium-containing particles into contact with a platinum ion-containing solution after the copper coating step. 2. The method for producing the core-shell catalyst according to claim 1 , wherein the palladium-containing particles are supported on a support. 3. The method for producing the core-shell catalyst according to claim 1 , wherein, in the stirring step, a stirring time is 15 to 30 minutes.
Assignees
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Classifications
Operations & Transport · mapped topic
Copper and noble metals · CPC title
supported on carriers, e.g. powder carriers · CPC title
of metal substrates · CPC title
on carbon or graphite · CPC title
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- What does patent US10232351B2 cover?
- To produce a core-shell catalyst with high catalytic activity for a short period of time. Disclosed is a method for producing a core-shell catalyst comprising a core containing palladium and a shell containing platinum and coating the core, the method comprising: supplying palladium-containing particles and a copper-containing material to an acid solution; stirring the acid solution with introd…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B01J21/18. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 19 2019 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).