US 12,294,092 B2
Membrane electrode assembly including anode having hydrogen reducion catalyst and carbon monoxide oxidation catalyst and fuel cell
Jens-Peter Suchsland, Alzenau (DE); Thomas Martin, Haguenau (FR); Matthias Binder, Gelnhausen (DE); Dominik Gehrig, Hanau (DE); and Christian Eickes, Frankfurt am Main (DE)
Assigned to Greenerity GmbH, Alzenau (DE)
Appl. No. 17/630,182
Filed by Greenerity GmbH, Alzenau (DE)
PCT Filed Jul. 10, 2020, PCT No. PCT/EP2020/069634
§ 371(c)(1), (2) Date Jan. 26, 2022,
PCT Pub. No. WO2021/018554, PCT Pub. Date Feb. 4, 2021.
Prior Publication US 2022/0255088 A1, Aug. 11, 2022
Int. Cl. H01M 4/92 (2006.01); H01M 4/86 (2006.01); H01M 8/1004 (2016.01)
CPC H01M 4/921 (2013.01) [H01M 4/8652 (2013.01); H01M 4/926 (2013.01); H01M 8/1004 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A fuel cell comprising a membrane electrode assembly comprising a cathode, an anode and a proton-conductive membrane, wherein
the cathode comprises a first metal-containing catalyst and a proton-conductive ionomer,
the anode comprises a proton-conductive ionomer, a second metal-containing catalyst that catalyzes a reaction of hydrogen to protons, and a third metal-containing catalyst that catalyzes a reaction of CO to CO2,
a total mass ratio of platinum of the second catalyst and platinum of the third catalyst to a total mass ratio of metals of the second catalyst and the third catalyst, but not including platinum, is greater than 3:1 and smaller than or equal to 9:1,
wherein the mass ratio of platinum of the first catalyst to the total mass ratio of metals of the second catalyst and the third catalyst, but not including platinum, is greater than 12:1, and
the total mass per unit area of platinum of the second catalyst and platinum of the third catalyst is less than 0.4 mg/cm2, and
wherein the third catalyst is an alloy, and the alloy comprises platinum and at least one element selected from the group consisting of Ru, Rh, Ni, Cu and Ir.