ANODE CATALYST LAYER FOR USE IN A PROTON EXCHANGE MEMBRANE FUEL CELL

摘要

A catalyst layer including: (i) a first catalytic material, wherein the first catalytic material facilitates a hydrogen oxidation reaction suitably selected from platinum group metals, gold, silver, base metals or an oxide thereof; and (ii) a second catalytic material, wherein the second catalytic material facilitates an oxygen evolution reaction, wherein the second catalytic material includes iridium or iridium oxide and one or more metals M or an oxide thereof, wherein M is selected from the group consisting of transition metals and Sn, wherein the transition metal is preferably selected from the group IVB, VB and VIB; and the first catalytic material is supported on the second catalytic material. The catalyst can be used in fuel cells, supported on electrodes or polymeric membranes for increasing tolerance to cell voltage reversal.

主权项

1. A method for increasing the tolerance to incidences of cell reversal at the anode of a proton exchange membrane fuel cell, said method comprising providing an anode catalyst layer comprising a first catalytic material which facilitates a hydrogen oxidation reaction and a second catalytic material which facilitates an oxygen evolution reaction, wherein the second catalytic material comprises iridium or iridium oxide and one or more metals M or an oxide thereof, wherein M is selected from the group consisting of Group IVB, VB and VIB metals and Sn, and wherein the first catalytic material is supported on the second catalytic material.