| 摘要 |
PROBLEM TO BE SOLVED: To resolve a problem that when hydrogen fed from methane or the like through a reformer is used on the fuel gas feeding side of a polymer electro lyte fuel cell, carbon monoxide or the like is produced together with hydrogen to poison the catalyst in an electrode of the fuel cell, and the degree of the catalyst poisoning is remarkably different between upstream and downstream a fed gas passage. SOLUTION: On the fuel gas side, that is, the anode side of a catalyst layer in the electrode, the catalyst making amount downstream the passage is set higher than that upstream thereof and the constituent ratio of the catalyst to the high polymer electrolyte is made more than 50% so as to cope with the poisoning of the catalyst by the carbon monoxide. On the oxidizing agent side, that is, the cathode side, the catalyst making amount downstream the passage is made higher than that upstream thereof and the constituent ratio of the catalyst to the high polymer electrolyte is made more than 50%, so that the above purpose can be accomplished. |
