| 摘要 |
A porous oxygen electrode is made by impregnating a porous conductive body with a silver salt, drying the body, and reducing the salt to silver metal at a temperature below the thermal decomosition temperature of the salt. Reduction may be effected electrolytically or by heating in hydrogen at 150-180 DEG C. (Ag2CO3), or at 200 DEG C. (AgNO3), or by chemical reduction, e.g. when AgCl is used. In examples, silver carbonate is dissolved in ammoniacal ammonium carbonate and used to impregnate graphite. Drying is effected by freezing, after which the body is heated in hydrogen. Alternatively the graphite body may be saturated with silver nitrate and then dipped in Na2CO3 solution, thereafter the silver carbonate is reduced electrolytically. As porous bodies, porous plastic bodies impregnated with nickel, or sintered powdered metals, e.g. Ni, Co, or steel. |
