Gas Diffusion Electrodes and Methods for Fabricating and Testing Same
US-2015376803-A1 · Dec 31, 2015 · US
Ternary platinum alloy catalyst
US9923210B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9923210-B2 |
| Application number | US-201414224291-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 25, 2014 |
| Priority date | Feb 11, 2009 |
| Publication date | Mar 20, 2018 |
| Grant date | Mar 20, 2018 |
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Abstract
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A platinum alloy catalyst PtXY, wherein X is nickel, cobalt, chromium, copper, titanium or manganese and Y is tantalum or niobium, characterised in that in the alloy the atomic percentage of platinum is 46-75 at %, of X is 1-49 at % and of Y is 1-35 at %; provided that the alloy is not 66 at % Pt20 at % Cr14 at % Ta or 50 at % Pt, 25 at % Co, 25 at % Ta is disclosed. The catalyst has particular use as an oxygen reduction catalyst in fuel cells, and in particular in phosphoric acid fuel cells.
First claim
Opening claim text (preview).
The invention claimed is: 1. A cathode for a fuel cell, said cathode comprising a ternary platinum alloy catalyst PtXY, wherein X is nickel, cobalt, chromium, copper, titanium or manganese and Y is niobium, and wherein in the alloy the atomic percentage of platinum is 46-75 at %, of X is 1-49 at % and of Y is 1-20 at %, and wherein the ternary platinum catalyst catalyzes an oxygen reduction reaction. 2. The platinum alloy catalyst cathode according to claim 1 , wherein in the ternary platinum catalyst PtXY, X is nickel, cobalt, chromium or copper. 3. The cathode according to claim 2 , wherein in the ternary platinum catalyst PtXY, X is nickel or cobalt. 4. The cathode according to claim 1 , wherein the ternary platinum alloy catalyst is unsupported or supported on a dispersed support material. 5. The cathode according to claim 4 , wherein the ternary platinum alloy catalyst is supported on a dispersed support material. 6. The cathode according to claim 5 , wherein the support material is a corrosion resistant carbon. 7. A fuel cell comprising the cathode according to claim 1 . 8. The fuel cell according to claim 7 , wherein the fuel cell is a phosphoric acid fuel cell.
Assignees
Inventors
Classifications
Making amorphous alloys · CPC title
Alloys based on a platinum group metal · CPC title
Fuel cells with polymeric electrolytes · CPC title
Phosphoric acid fuel cells [PAFC] · CPC title
- H01M4/921Primary
Alloys or mixtures with metallic elements · CPC title
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- What does patent US9923210B2 cover?
- A platinum alloy catalyst PtXY, wherein X is nickel, cobalt, chromium, copper, titanium or manganese and Y is tantalum or niobium, characterised in that in the alloy the atomic percentage of platinum is 46-75 at %, of X is 1-49 at % and of Y is 1-35 at %; provided that the alloy is not 66 at % Pt20 at % Cr14 at % Ta or 50 at % Pt, 25 at % Co, 25 at % Ta is disclosed. The catalyst has particular…
- Who is the assignee on this patent?
- Johnson Matthey Fuel Cells Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/921. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 20 2018 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).