Electrode catalyst, and membrane electrode assembly and fuel cell using electrode catalyst
US-2019336956-A1 · Nov 7, 2019 · US
Electrocatalyst
US11901568B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11901568-B2 |
| Application number | US-202217653400-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 3, 2022 |
| Priority date | Mar 4, 2021 |
| Publication date | Feb 13, 2024 |
| Grant date | Feb 13, 2024 |
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- Title
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Abstract
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To provide an electrocatalyst for fuel cells, which is configured to ensure both the initial performance and durability of fuel cells. An electrocatalyst for fuel cells, wherein the electrocatalyst comprises a carbon support including a mesopore and a catalyst alloy supported on the carbon support, and the catalyst alloy is a catalyst alloy of platinum and a transition metal; wherein the mesopore includes at least one throat; wherein an average effective diameter of the at least one throat is 1.8 nm or more and less than 3.2 nm; and wherein a transition metal ratio of the catalyst alloy supported on a deeper-side region than the at least one throat, is lower than the transition metal ratio of the catalyst alloy supported on a nearer-side region than the at least one throat.
First claim
Opening claim text (preview).
The invention claimed is: 1. An electrocatalyst for fuel cells, wherein the electrocatalyst comprises a carbon support including a mesopore and a catalyst alloy supported on the carbon support, and the catalyst alloy is a catalyst alloy of platinum and a transition metal; wherein the mesopore includes at least one throat; wherein an average effective diameter of the at least one throat is 1.8 nm or more and less than 3.2 nm; and wherein a transition metal ratio of the catalyst alloy supported on a deeper-side region than the at least one throat, is lower than the transition metal ratio of the catalyst alloy supported on a nearer-side region than the at least one throat. 2. The electrocatalyst according to claim 1 , wherein an average effective diameter of the mesopore is 3.2 nm or more and 3.8 nm or less. 3. The electrocatalyst according to claim 1 , wherein the average effective diameter of the at least one throat is 1.8 nm or more and 2.1 nm or less. 4. The electrocatalyst according to claim 1 , wherein the transition metal is at least one selected from the group consisting of cobalt and nickel. 5. A fuel cell comprising a catalyst layer comprising the electrocatalyst defined by claim 1 .
Assignees
Inventors
Classifications
- H01M4/926Primary
on carbon or graphite · CPC title
Coating using a catalyst salt precursor in solution followed by evaporation and reduction of the precursor · CPC title
Alloys based on a platinum group metal · CPC title
Fuel cells · CPC title
Alloys or mixtures with metallic elements · CPC title
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- What does patent US11901568B2 cover?
- To provide an electrocatalyst for fuel cells, which is configured to ensure both the initial performance and durability of fuel cells. An electrocatalyst for fuel cells, wherein the electrocatalyst comprises a carbon support including a mesopore and a catalyst alloy supported on the carbon support, and the catalyst alloy is a catalyst alloy of platinum and a transition metal; wherein the mesopo…
- Who is the assignee on this patent?
- Shimizu Ryo, Nomura Kumiko, Takeshita Tomohiro, and 4 more
- 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 Feb 13 2024 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).