Nitride stabilized core/shell nanoparticles
US-2018134559-A1 · May 17, 2018 · US
Catalyst for solid polymer fuel cells and method for manufacturing the same
US11239473B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11239473-B2 |
| Application number | US-201816606180-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 16, 2018 |
| Priority date | Apr 19, 2017 |
| Publication date | Feb 1, 2022 |
| Grant date | Feb 1, 2022 |
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Abstract
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The present invention relates to a catalyst for solid polymer fuel cells in which catalyst particles including platinum or platinum alloy are supported on a carbon powder carrier. The catalyst of the present invention is a catalyst for solid polymer fuel cells in which the bond energy (Ec) at a gravity center position is 2.90 eV or more and 3.85 eV or less as calculated from a spectrum area of a Pt5d orbit-derived spectrum which is obtained by measuring a valence band spectrum in a range of 0 eV or more and 20 eV or less in the result of subjecting the catalyst particles to X-ray photoelectron spectroscopic analysis.
First claim
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The invention claimed is: 1. A catalyst for solid polymer fuel cells in which catalyst particles consisting of platinum or a single phase platinum alloy are supported on a carbon powder carrier, wherein a bond energy (Ec) at a gravity center position is 2.90 eV or more and 3.85 eV or less as calculated from a spectrum area of a Pt5d orbit-derived spectrum which is obtained by subjecting the catalyst particles to X-ray photoelectron spectroscopic analysis to measure a valence band spectrum in a range of 0 eV or more and 20 eV or less wherein the X-ray photoelectron spectroscopic analysis uses a monochromatized Al-KαX-ray source. 2. The catalyst for solid polymer fuel cells according to claim 1 , wherein the bond energy (Ec) at the gravity center position is 2.95 eV or more and 3.78 eV or less. 3. The catalyst for solid polymer fuel cells according to claim 1 , wherein the bond energy (Ec) at the gravity center position is 2.95 eV or more and 3.65 eV or less. 4. The catalyst for solid polymer fuel cells according to claim 1 , wherein the bond energy (Ec) at the gravity center position is 2.95 eV or more and 3.53 eV or less. 5. The catalyst for solid polymer fuel cells according to claim 1 , wherein a ratio of zerovalent platinum to platinum present on surfaces of the catalyst particles is 95% or more and 100% or less. 6. The catalyst for solid polymer fuel cells according to claim 1 , wherein a ratio of zerovalent platinum to platinum present on surfaces of the catalyst particles is 100%. 7. The catalyst for solid polymer fuel cells according to claim 1 , wherein a ratio of zerovalent platinum to platinum present on surfaces of the catalyst particles is 75% or more and 100% or less. 8. The catalyst for solid polymer fuel cells according to claim 7 , wherein the catalyst particles have a particle size of 2 nm or more and 500 nm or less. 9. The catalyst for solid polymer fuel cells according to claim 7 , wherein a carrying rate of the catalyst particles is 20% or more and 70% or less. 10. The catalyst for solid polymer fuel cells according to claim 1 , wherein the catalyst particles have a particle size of 2 nm or more and 500 nm or less. 11. The catalyst for solid polymer fuel cells according to claim 10 , wherein a carrying rate of the catalyst particles is 20% or more and 70% or less. 12. The catalyst for solid polymer fuel cells according to claim 1 , wherein a carrying rate of the catalyst particles is 20% or more and 70% or less. 13. The catalyst for solid polymer fuel cells according to claim 1 , in which the catalyst particles consist of platinum. 14. The catalyst for solid polymer fuel cells according to claim 1 , in which the catalyst particles consist of the single phase platinum alloy.
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- What does patent US11239473B2 cover?
- The present invention relates to a catalyst for solid polymer fuel cells in which catalyst particles including platinum or platinum alloy are supported on a carbon powder carrier. The catalyst of the present invention is a catalyst for solid polymer fuel cells in which the bond energy (Ec) at a gravity center position is 2.90 eV or more and 3.85 eV or less as calculated from a spectrum area of …
- Who is the assignee on this patent?
- Tanaka Precious Metal Ind
- 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 01 2022 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).