| 摘要 |
PURPOSE:To electrolyze water at a low voltage and to manufacture hydrogen efficiently, by a method wherein an anode, which transmits gas and liquid, is tightly attached on one side of a cation exchange membrane containing fluorine and a carboxyl group and a cathode, which transmits gas and liquid, on the other side. CONSTITUTION:A cation exchange membrane is used which is manufactured from a copolymer of a fluorinated olefin monomer and fluorinated monomer containing a carboxyl group or a functional group, which can be converted into the carboxyl group. The membrane has a concentration of the carboxyl group of 0.9-2 milli-equivalent per 1g dried resin, and a concentration of carboxylic acid per 1g water in the membrane in an alkali hydroxide with a concentration equal to that of the solution which is brought into contact with the membrane under a condition of electrolysis is 8-28 milli-equivalent. Diaphragms, which transmit gas and liquid, with 0.01-30mu mean pore diameter, 30-90% porosity and air permeability of 1X10<-6>-1mol/cm<2>.min.cmHg, are tightly attached on one side of the membrane as an anode and on the other side as a cathode. Water is supplied to a cathode chamber partitioned by the cation membrane and H2 is efficiently obtained at a low voltage. |
