Catalyst and electrode catalyst layer, membrane electrode assembly, and fuel cell using the catalyst
US-9947934-B2 · Apr 17, 2018 · US
Catalyst and electrode catalyst layer, membrane electrode assembly, and fuel cell using the catalyst
US11031604B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11031604-B2 |
| Application number | US-201916529031-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 1, 2019 |
| Priority date | Apr 25, 2013 |
| Publication date | Jun 8, 2021 |
| Grant date | Jun 8, 2021 |
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- Title
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Abstract
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Provided is a catalyst having excellent gas transportability. Disclosed is a catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support, wherein the catalyst includes pores having a radius of less than 1 nm and pores having a radius of 1 nm or more, wherein a pore volume of the pores having a radius of less than 1 nm is 0.3 cc/g support or more or a mode radius of a pore distribution of the pores having a radius of less than 1 nm is 0.3 nm or more and less than 1 nm, and wherein the catalyst metal is supported inside the pores having a radius of 1 nm or more.
First claim
Opening claim text (preview).
The invention claimed is: 1. A catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support, wherein the catalyst includes pores having a radius of less than 1 nm and pores having a radius of 1 nm or more, wherein a pore volume of the pores having a radius of less than 1 nm is 0.3 cc/g support to 2 cc/g support, wherein the catalyst metal has particles supported inside the pores having a radius of 1 nm or more and has particles supported on an outer surface of the catalyst support, wherein a number of the particles of the catalyst metal supported inside the pores having a radius of 1 nm or more is greater than a number of the particles of the catalyst metal supported on the outer surface of the catalyst support, and wherein the outer surface of the catalyst support is not an inner surface of the pores having a radius of 1 nm or more. 2. The catalyst according to claim 1 , wherein a pore volume of the pores having a radius of less than 1 nm is 0.83 cc/g support to 2 cc/g support. 3. The catalyst according to claim 1 , wherein a mode radius of a pore distribution of the pores having a radius of less than 1 nm is 0.3 nm or more and less than 1 nm. 4. The catalyst according to claim 1 , wherein an average particle diameter of the catalyst metal is 3 nm or more. 5. The catalyst according to claim 1 , wherein a pore volume of the pores having a radius of 1 nm or more is 0.4 cc/g support or more. 6. The catalyst according to claim 1 , wherein a mode radius of a pore distribution of the pores having a radius of 1 nm or more of the catalyst is in the range of 1 to 5 nm. 7. The catalyst according to claim 1 , wherein a BET specific surface area of the catalyst is 1000 m 2 /g support or more. 8. The catalyst according to claim 7 , wherein a BET specific surface area of the catalyst is 1440 m 2 /g support or more. 9. The catalyst according to claim 1 , wherein the catalyst metal is platinum or includes platinum and a metal component other than platinum. 10. An electrode catalyst layer for a fuel cell comprising the catalyst set forth in claim 1 , and an electrolyte. 11. A membrane electrode assembly for a fuel cell comprising the electrode catalyst layer for a fuel cell set forth in claim 10 . 12. A fuel cell comprising the membrane electrode assembly for a fuel cell set forth in claim 11 . 13. The catalyst according to claim 1 , wherein a mode radius of a pore distribution of the pores having a radius of 1 nm or more of the catalyst is in the range of 1 to 3 nm. 14. The catalyst according to claim 1 , wherein a ratio of (1) decreased pore volume of the pores having a radius of less than 1 nm before and after the supporting to (2) the pore volume of the pores having a radius of less than 1 nm before the supporting is 29/92 or less.
Assignees
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Classifications
Fuel cells · CPC title
on carbon or graphite · CPC title
Carbonaceous material · CPC title
Alloys or mixtures with metallic elements · CPC title
Fuel cells with polymeric electrolytes · CPC title
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- What does patent US11031604B2 cover?
- Provided is a catalyst having excellent gas transportability. Disclosed is a catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support, wherein the catalyst includes pores having a radius of less than 1 nm and pores having a radius of 1 nm or more, wherein a pore volume of the pores having a radius of less than 1 nm is 0.3 cc/g support or more or a mode radiu…
- Who is the assignee on this patent?
- Nissan Motor
- What technology area does this patent fall under?
- Primary CPC classification H01M4/8605. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 08 2021 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).