FIELD: electrocatalytic composition for cathode with oxygen depolarization.
SUBSTANCE: cathode is designed for mounting in membrane electrolyzers for decomposition of aqueous solution of hydrochloric acid. Cathode is mounted in direct contact with membrane for preventing hydrogen separation and mixing of hydrogen and oxygen even at maximum density of electric current. It is possible to use technical grade hydrochloric acid with concentration no more than 15% at working temperature no more than 60°C. Cathode composition contains rhodium sulfide and platinum group metal applied as mixture in one layer or alternatively applied separately in the form of two different layers.
EFFECT: improved electrolysis process of technical grade hydrochloric acid.
22 cl, 2 dwg, 3 tbl
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