| 摘要 |
PURPOSE:To provide a fuel cell electrode having a large reaction surface area, high resistance to various impurities in fuel gas, and an excellent catalytic function. CONSTITUTION:A carbon supported platinum catalyst is kneaded with a fluoro- binding agent, is then applied onto a conductive porous gas, and baked to form a porous gas diffusion electrode. Next, the porous gas diffusion electrode is immersed for about one hour in a solution obtained by the dissolving of 2%, SnCl4 and an excess amount of sodium formate in one mol of H3PO4, and the electrode is dried and completed. A catalyst layer comprises a support carbon 1, platinum layers 2 supported by the carbon 1, and Sn layers 3 formed on the surface of the platinum layers 2 as base metal element layers. In this case, a plurality of platinum layers 2 are formed with fine particles as units, and a single or plural Sn layers 3 are formed with fine particles as units. |
