Electrode catalyst layer for fuel cell, method for producing the same, and membrane electrode assembly and fuel cell using the catalyst layer
US-2017331134-A1 · Nov 16, 2017 · US
Catalyst and manufacturing method thereof, and electrode catalyst layer using the catalyst
US10573901B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10573901-B2 |
| Application number | US-201414786056-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 14, 2014 |
| Priority date | Apr 25, 2013 |
| Publication date | Feb 25, 2020 |
| Grant date | Feb 25, 2020 |
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- Title
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Abstract
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[Solving Means] Disclosed is a catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support, wherein the catalyst support includes pores having a radius of less than 1 nm and pores having a radius of 1 nm or more, a surface area formed by the pores having a radius of less than 1 nm is equal to or larger than a surface area formed by the pores having a radius of 1 nm or more, and an average particle diameter of the catalyst metal is 2.8 nm or more.
First claim
Opening claim text (preview).
The invention claimed is: 1. An electrode catalyst for a fuel cell, comprising: a catalyst support, having a main component of carbon, and a catalyst metal supported on the catalyst support, wherein the catalyst support includes pores having a radius of less than 1 nm and pores having a radius in the range of 1 nm to 10 nm, wherein a surface area formed by the pores having a radius of less than 1 nm is equal to or larger than a surface area formed by the pores having a radius in the range of 1 nm to 10 nm, wherein an average particle diameter of the catalyst metal is in the range of 3.8 nm to 30 nm, wherein a larger number of catalyst metals are supported in pores having a radius in the range of 1 nm to 10 nm than in pores having a radius of less than 1 nm, wherein 50wt % or more of the catalyst metal is supported inside the pores having a radius in the range of 1 nm to 10 nm, and wherein a pore volume of the pores having a radius of less than 1 nm of the catalyst support is in the range of 0.1 cc/g to 3 cc/g. 2. The electrode catalyst for a fuel cell according to claim 1 , wherein the catalyst support has a BET specific surface area in the range of 1100 m 2 /g support to 3000 m 2 /g support. 3. The electrode catalyst for a fuel cell according to claim 1 , wherein the catalyst metal is platinum or includes platinum and a metal component other than platinum. 4. The electrode catalyst for a fuel cell according to claim 1 , wherein the average particle diameter of the catalyst metal is in the range of 4.1 nm to 30 nm. 5. An electrode catalyst layer for a fuel cell, comprising the catalyst set forth in claim 1 , and an electrolyte. 6. The electrode catalyst layer for a fuel cell according to claim 5 , wherein the catalyst metal is supported inside the pores having a radius in the range of 1 nm to 10 nm such that the catalyst metal is not in contact with the electrolyte. 7. The electrode catalyst layer for a fuel cell according to claim 5 , wherein 50% wt or more of the catalyst metal is supported inside the pores having a radius in the range of 1 nm to 10 nm such that the 50% wt or more of the catalyst metal is not in contact with the electrolyte. 8. The electrode catalyst for a fuel cell according to claim 1 , wherein the pore volume of the pores having a radius of less than 1 nm of the catalyst support is in the range of 0.3 cc/g to 3 cc/g. 9. The electrode catalyst for a fuel cell according to claim 1 , wherein the catalyst metal is an alloy of platinum and cobalt and the average diameter of the catalyst metal is in the range of 4.1 nm to 30 nm. 10. The electrode catalyst for a fuel cell according to claim 1 , wherein the catalyst support consists only of carbon atoms. 11. The electrode catalyst for a fuel cell according to claim 1 , wherein the catalyst support consists essentially of carbon atoms.
Assignees
Inventors
Classifications
followed by reduction of the catalyst salt precursor · CPC title
on carbon or graphite · CPC title
Fuel cells with polymeric electrolytes · CPC title
- H01M4/9075Primary
Catalytic material supported on carriers, e.g. powder carriers (H01M4/8807, H01M4/881, H01M4/8814, H01M4/925 take precedence) · CPC title
Sintering or firing · CPC title
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Frequently asked questions
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- What does patent US10573901B2 cover?
- [Solving Means] Disclosed is a catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support, wherein the catalyst support includes pores having a radius of less than 1 nm and pores having a radius of 1 nm or more, a surface area formed by the pores having a radius of less than 1 nm is equal to or larger than a surface area formed by the pores having a radius of …
- Who is the assignee on this patent?
- Tanaka Precious Metal Ind
- What technology area does this patent fall under?
- Primary CPC classification H01M4/9075. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 25 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).