In order to prevent the crossover of an organic fuel such as methanol in a fuel cell and to exhibit excellent electricity generation characteristics without impairing the utilization efficiency of the fuel, at least either of (1) a discontinuous catalyst layer being formed on a surface of an anode catalyst layer and having a higher density (existence probability) of platinum type catalyst than the anode catalyst layer and (2) an electrolyte polymer layer is formed at the interface between the anode catalyst layer and a polymer electrolyte membrane.

 
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