FUEL CELL LIMITING CO POISONING AND POISONING DIAGNOSTIC PROCESS

The invention relates to a unit cell (1) of a fuel cell (4), comprising: a membrane-electrode assembly (110), including: a proton exchange membrane (113); an anode electrode (111) fastened to a firstface of the proton exchange membrane; a first flow guide plate (51) positioned facing the anode electrode (111) and comprising at least one flow channel having a fuel inlet zone, a median flow zone and a fuel outlet zone. Said anode electrode (111) has, at said fuel outlet zone, a tolerance to carbon monoxide pollution greater than its average tolerance to carbon monoxide pollution at the median flow zone and at the fuel inlet zone. 本发明涉及一种燃料电池(4)的单元(1)，其包括：-膜-电极组件(110)，其包括：-质子交换膜(113)；-固定到所述质子交换膜的第一面的阳极电极(111)；-第一流动引导板(51)，其布置为面对所述阳极电极(111)，并包括具有燃料输入区域、中间流动区域和燃料输出区域的至少一个流动通道。所述阳极电极(111)在所述燃料输出区域处对一氧化碳污染的耐受性高于所述阳极电极在所述中间流动区域处和所述燃料输入区域处对一氧化碳污染的平均耐受性。