GAS DIFFUSION ELECTRODE, ITS PRODUCTION METHOD, AND ELECTROLYSIS METHOD

摘要

PROBLEM TO BE SOLVED: To provide a gas diffusion electrode which can inexpensively and easily be produced and has excellent electrode properties and durability, to provide its production method and to provide an electrolysis method using the same.

SOLUTION: The gas diffusion electrode consists of a porous sheet which is formed of hydrophobic carbon and a fluororesin, contains no hydrophilic carbon or hydrophilic carbon and catalysts, and permeates gas but does not leak liquid. When the electrode is arranged as the oxygen cathode of an alkali chloride aqueous solution electrolytic cell using an ion exchange membrane method for producing alkali metal hydroxide, the electrode properties improve with the increase of electrolysis time compared with a gas diffusion electrode consisting of the two layers of a reaction layer and a gas feed layer.

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