Catalytic recombination of corrosion evolved hydrogen in alkalin

Details Catalytic recombination of corrosion evolved hydrogen in alkalin Catalytic recombination of corrosion evolved hydrogen in alkalin

1989-07-06

1990-05-15

Kalafut, Stephen J.

Chemistry: electrical current producing apparatus, product, and

Sealed cell having gas prevention or elimation means

Prevention or elimination means is one of the cell...

429206, H07M 1034

Patent

active

049257471

ABSTRACT:
In rechargeable or primary, electrochemical cells, hydrogen may evolve. The invention concerns the use of an auxiliary electrode material to catalyse the recombination of pressurized hydrogen, for example, the hydrogen being at pressures ranging from 5 to 15 psig up to pressure relief of the cell. The cell is a sealed cell having a metal oxide cathode, a zinc anode and aqueous, alkaline electrolyte contacting both anode and cathode. The auxiliary electrode material, which may be mixed with the cathode material or be formed into a discrete auxiliary electrode, comprises a porous substrate and a catlyst for the absorbtion of pressurized hydrogen by the electrolyte. The substrate may be carbon, graphite or metal. The catalyst may be carbon, catalytically active noble metals, salts and oxides of lead, nickel, titanium, lanthanum, chromium, tantalum and alloys thereof, and the metals or mixtures of carbon with the salts or oxides.

REFERENCES:
patent: 3108908 (1963-10-01), Krobs
patent: 3893870 (1975-07-01), Kozawa

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