| 摘要 |
PURPOSE: To substantially reduce a catalyst amount by forming a catalyst layer multi-layered in a specific condition, regarding the subject electrode where a catalyst layer containing catalyst particles is formed in such a state as active metal carried on a gas diffusion layer. CONSTITUTION: Regarding the subject electrode preferably used for a solid polymeric fuel cell where a catalyst layer containing catalyst particles (e.g. carbon black particles) with active metal (e.g. platinum) carried on a gas diffusion layer, preferably water repellent carbon paper, is formed, the catalyst layer is formed out of a multilayer of catalyst particles carrying a different metal amount. For example, catalyst particles are prepared so as to contain 30wt.%, 40wt.% and 50wt.% of platinum respectively, and stacked on carbon paper in order, thereby providing an electrode having a total stacked platinum amount of 3mg/cm<2> . In this case, the electrode so prepared and another electrode with one layer of catalyst particles containing 50 wt% of platinum by 4 mg/cm" can provide a platinum reduction effect approximately under the same quantity of electricity. |
