| 摘要 |
PROBLEM TO BE SOLVED: To increase the output by providing a catalytic layer having the structure containing a fine porous assembly consisting of a catalyst and an electrolyte B in the pores of a porous electrolyte having three-dimensionally communicating pores. SOLUTION: A fine porous assembly 3 consisting of a catalyst and an electrolyte B is included in pores of a porous electrode A2 having three-dimensionally communicating pores. A first gas diffusion layer 4 is bonded to a first catalyst layer 1 to form a first gas diffusion electrode 5. The catalyst consists of a so-called platinum support carbon catalyst having platinum supported as catalyst on a carbon carrier. As the catalyst, fine powder of a platinum group metal or alloy thereof, for example, platinum black powder is also usable. The electrolyte B covering the catalyst has the function of an adhesive, and forms a so- called three-phase interface where electrochemical reaction progresses. Since the film of the electrolyte B forms the route for proton movement to the reaction site, it desirably has high proton conductivity. |
