Method for producing carrier for electrode catalyst, precursor of carrier for electrode catalyst, and carrier for electrode catalyst, comprising same
US-12057587-B2 · Aug 6, 2024 · US
Carbon-supported catalyst
US9627692B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9627692-B2 |
| Application number | US-201515117532-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 6, 2015 |
| Priority date | Feb 14, 2014 |
| Publication date | Apr 18, 2017 |
| Grant date | Apr 18, 2017 |
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Abstract
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The present invention is to provide such a carbon-supported catalyst that an activity expected from a catalytic activity by rotating disk electrode (RDE) evaluation is maintained even after the formation of a membrane electrode assembly (MEA). Disclosed is a carbon-supported catalyst wherein the carbon-supported catalyst includes fine catalyst particles that have a palladium-containing particle and a platinum-containing outermost layer covering at least part of the palladium-containing particle, and a carbon support supporting the fine catalyst particles, and wherein, in a cyclic voltammogram that is obtained by measuring, in an acid solution, the carbon-supported catalyst applied to a measurement electrode made of an electroconductive material, the proportion of the area of a hydrogen adsorption region that appears in a reduction current region to the total area of the hydrogen adsorption region and a hydrogen occlusion region that appears in the reduction current region, is 29% to 36%.
First claim
Opening claim text (preview).
The invention claimed is: 1. A carbon-supported catalyst, wherein the carbon-supported catalyst comprises fine catalyst particles that have a palladium-containing particle and a platinum-containing outermost layer covering at least part of the palladium-containing particle, and a carbon support supporting the fine catalyst particles; wherein, in a cyclic voltammogram that is obtained by measuring, in an acid solution, the carbon-supported catalyst applied to a measurement electrode made of an electroconductive material, a proportion of an area of a hydrogen adsorption region that appears in a reduction current region to a total area of the hydrogen adsorption region and a hydrogen occlusion region that appears in the reduction current region, is 29% to 36%; and wherein the cyclic voltammogram is obtained by cyclic voltammetry under conditions that a sweep rate is 50 mV/s and the acid solution has a temperature of 25° C. and is a 0.1 M perchloric acid aqueous solution subjected to inert gas bubbling. 2. The carbon-supported catalyst according to claim 1 , wherein the fine catalyst particles have an average particle diameter of 3 nm or more and 10 nm or less.
Assignees
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Classifications
Nanoparticles · CPC title
of particles · CPC title
Carbon · CPC title
Platinum · CPC title
- H01M4/926Primary
on carbon or graphite · CPC title
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- What does patent US9627692B2 cover?
- The present invention is to provide such a carbon-supported catalyst that an activity expected from a catalytic activity by rotating disk electrode (RDE) evaluation is maintained even after the formation of a membrane electrode assembly (MEA). Disclosed is a carbon-supported catalyst wherein the carbon-supported catalyst includes fine catalyst particles that have a palladium-containing particle…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/926. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 18 2017 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).