Coated cathode for electrolysis cells

Details Coated cathode for electrolysis cells Coated cathode for electrolysis cells

1977-07-11

1978-07-11

Mack, John H.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204290R, C25B 900, C25B 1104

Patent

active

041000498

ABSTRACT:
An active coating comprised of a mixture of palladium oxide and zirconium dioxide deposited on a metal substrate selected from a group consisting of iron, nickel, cobalt and alloys thereof, results in a lower hydrogen overpotential at the cathode in the electrolysis of aqueous alkali metal halide solutions. Salts of the component metals of the coating are deposited on the cathode surface preferably by painting. The coating metals are then converted to the corresponding metal oxides through the heating of the coating and substrate to 300.degree. to 600.degree. C in an oxidizing atmosphere such as air or oxygen. The coating results in a lowering of the hydrogen discharge overpotential at the cathode surface of about 50 to 100 millivolts as compared with the hydrogen discharge overpotential for the mild steel substrate commonly used as a cathode in electrolysis cells.

REFERENCES:
patent: 3684543 (1972-08-01), Denora et al.
patent: 3810770 (1974-05-01), Bianchi et al.
patent: 4005004 (1977-01-01), Seko et al.
patent: 4012296 (1977-03-01), Stephens et al.

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