| 摘要 |
PROBLEM TO BE SOLVED: To provide a novel catalyst layer which exhibits high effectiveness of preventing reduction in power generation capacity.SOLUTION: In a cathode 22 as an electrode catalyst layer, Pt carrying carbon particles 50 and Pt non-carrying carbon particles 51 are mixed in a state coated, respectively, with a first electrolyte resin 71 and a second electrolyte resin 72. Since the second electrolyte resin 72 with which the Pt non-carrying carbon particles 51 are coated has an ion exchange group equivalent smaller than that of the first electrolyte resin 71 with which the Pt carrying carbon particles 50 are coated, the second electrolyte resin 72 has a water retentivity higher than that of the first electrolyte resin 71 with which the Pt carrying carbon particles 50 are coated. |
