| 摘要 |
A novel catalyst for a fuel cell, which comprises an electroconductive carrier and a Pt group element being attached on the surface of the carrier in such a manner that the surface is covered with the Pt group element; and a method for preparing the catalyst which comprises providing a mixture of a Pt group element compound an electroconductive carrier in the state of a gel or a high viscous material, reducing the Pt group element compound, and firing the resulting product, to form a catalyst layer comprising the Pt group element. A catalyst comprising an electroconductive carrier and a Pt group element being attached on the surface of the carrier has been used conventionally. The reaction rate on the surface of the catalyst has a direct effect on the electric current and thus on the efficiency of power generation, and accordingly, a catalyst capable of achieving a high reaction rate, or a catalyst having a great specific surface area has been required. However, conventional catalyst preparation methods have problems such as one that they have provided a catalyst having particles of a Pt group element attached on an electroconductive carrier only in a dispersal state but no catalyst having particles of the Pt group element attached on the carrier in such a manner that whole the surface of the carrier is covered with such particles, and thus they have failed to provide a catalyst having a great specific surface area. |
