Oxygen-generating electrode

Details Oxygen-generating electrode Oxygen-generating electrode

1990-12-13

1992-03-24

Valentine, Donald R.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204290F, 428472, C25B 1106, C25B 1110

Patent

active

050985469

ABSTRACT:
Proposal is made for providing a high-performance electrode suitable for use in an oxygen-generating electrolytic process having an outstandingly low oxygen overvoltage and exhibiting high durability in a prolonged run of electrolysis. The electrode consists of an electroconductive substrate of a metal, e.g., titanium, and a multiple composite oxide coating layer thereon consisting of at least one layer of type A composed of iridium oxide and tantalum oxide in an Ir:Ta molar ratio of 40:60 to 79.9:20.1 and at least one layer of type B formed on the type A layer composed of iridium oxide and tantalum oxide in an Ir:Ta molar ratio of 80:20 to 99.9:0.1. A plural number of type A layers and a plural number of type B layers can be alternately laid one on the other so as to improve the mechanical stability of the coating layer on the substrate surface.

REFERENCES:
patent: 3846273 (1974-11-01), Bianchi et al.
patent: 3878083 (1975-04-01), DeNora et al.
patent: 3926751 (1975-12-01), DeNora et al.
patent: 4072585 (1978-02-01), Bianchi et al.
patent: 4797182 (1989-01-01), Beer et al.

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