Gas Diffusion Electrodes and Methods for Fabricating and Testing Same
US-2015376803-A1 · Dec 31, 2015 · US
Use Of An Anode Catalyst Layer
US2018145338A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018145338-A1 |
| Application number | US-201815874000-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jan 18, 2018 |
| Priority date | Feb 5, 2013 |
| Publication date | May 24, 2018 |
| Grant date | — |
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Abstract
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A method of operating a fuel cell having an anode, a cathode and a polymer electrolyte membrane disposed between the anode and the cathode, includes feeding the anode with an impure hydrogen stream having low levels of carbon monoxide up to 5 ppm, and wherein the anode includes an anode catalyst layer including a carbon monoxide tolerant catalyst material, wherein the catalyst material includes: (i) a binary alloy of PtX, wherein X is a metal selected from the group consisting of rhodium and osmium, and wherein the atomic percentage of platinum in the alloy is from 45 to 80 atomic % and the atomic percentage of X in the alloy is from 20 to 55 atomic %; and (ii) a support material on which the PtX alloy is dispersed; wherein the total loading of platinum group metals (PGM) in the anode catalyst layer is from 0.01 to 0.2 mgPGM/cm 2 .
First claim
Opening claim text (preview).
What is claimed: 1 . A method of operating a fuel cell comprising an anode, a cathode and a polymer electrolyte membrane disposed between the anode and the cathode, wherein said method comprises feeding the anode with an impure hydrogen stream comprising low levels of carbon monoxide up to 5 ppm, and wherein the anode comprises an anode catalyst layer comprising a carbon .monoxide tolerant catalyst material, wherein the catalyst material comprises: (i) a binary alloy of PtX, wherein X is rhodium, and wherein the atomic percentage of platinum in the alloy is from 45 to 80 atomic % and the atomic percentage of X in the alloy is from 20 to 55 atomic %; and (ii) a support material on which the PtX alloy is dispersed; wherein the total loading of platinum group metals (PGM) in the anode catalyst layer is from 0.01 to 0.2 mgPGM/cm 2 . 2 . The method according to claim 1 , wherein the atomic percentage of Pt in the binary alloy is from 50 to 75 atomic % and the atomic percentage of X is from 25 to 50 atomic %. 3 . The method according to claim 1 , wherein the amount of platinum in the supported catalyst is 10-50wt % of the total weight of the binary alloy plus support material, 4 . The method according to claim 1 , wherein the anode further comprises a second catalyst. 5 . The method according to claim 4 , wherein the second catalyst is an oxygen evolution catalyst. 6 . The method according to claim 2 , wherein the atomic percentage of Pt in the binary alloy is from 50 to 75 atomic % and the atomic percentage of X is from 25 to 50 atomic %. 7 . The method according to claim 2 , wherein the amount of platinum in the supported catalyst is 10-50wt % of the total weight of the binary alloy plus support material. 8 . The method according to claim 2 , wherein the anode further comprises a second catalyst. 9 . The method according to claim 3 , wherein the anode further comprises a second catalyst. 10 . The method according to claim 8 , wherein the second catalyst is an oxygen evolution catalyst. 11 . The method according to claim 9 , wherein the second catalyst is an oxygen evolution catalyst.
Assignees
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Classifications
Fuel cells · CPC title
Osmium · CPC title
Coating with slurry or ink · CPC title
Negative electrodes · CPC title
Polymeric electrolyte materials · CPC title
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- What does patent US2018145338A1 cover?
- A method of operating a fuel cell having an anode, a cathode and a polymer electrolyte membrane disposed between the anode and the cathode, includes feeding the anode with an impure hydrogen stream having low levels of carbon monoxide up to 5 ppm, and wherein the anode includes an anode catalyst layer including a carbon monoxide tolerant catalyst material, wherein the catalyst material includes…
- 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 Thu May 24 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).