MEMBRANE ELECTRODE ASSEMBLY WITH SUPPORTED METAL OXIDE

A membrane electrode assembly comprises a polymer electrolyte interposed between an anode electrode and a cathode electrode, the anode electrode comprising an anode catalyst layer adjacent at least aportion of a first major surface of the polymer electrolyte, the cathode electrode comprising a cathode catalyst layer adjacent at least a portion of a second major surface of the polymer electrolyte;at least one of the anode and cathode catalyst layers comprising: a first catalyst composition comprising a noble metal; and a second composition comprising an iridium-containing metal oxide supported on a cerium oxide support. 膜电极组件包括：插置在阳极电极与阴极电极之间的聚合物电解质；包括与所述聚合物电解质的第一主要表面的至少一部分相邻的阳极催化剂层的所述阳极电极；包括与所述聚合物电解质的第二主要表面的至少一部分相邻的阴极催化剂层的所述阴极电极；所述阳极催化剂层和所述阴极催化剂层中的至少一个包含：包含贵金属的第一催化剂组合物；以及包含负载在氧化铈载体上的含铱金属氧化物的第二组合物。