ELECTROLYSIS CELL AND METHOD OF GENERATING HALOGEN

摘要

Halogen is produced by electrolyzing an aqueous halide in a cell comprising an anolyte chamber and a catholyte chamber separated by a permeable membrane or diaphragm (105). At least one electrode comprises at least two sections. One section comprises a gas and electrolyte permeable layer, sheet or mat (104) having a catalytic surface, i.e, one having a low overvoltage. This layer is spaced from the membrane (105) by a second section comprising a thin intermediate electroconductive layer, screen or coating (205) which is in contact with the membrane (105) on one side thereof, the other side thereof being in contact with the main cathode. This second or spacer section advantageously has an electrode surface having a higher overvoltage than the first electrode surface. Preferably the cathode has the above construction.