Catalytic recombination of corrosion evolved hydrogen in...

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

H - Electricity

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319/46

H01M 6/04 (2006.01) H01M 4/02 (2006.01) H01M 4/48 (2006.01) H01M 10/34 (2006.01) H01M 10/52 (2006.01)

Patent

CA 1307818

CATALYTIC RECOMBINATION OF CORROSION EVOLVED HYDROGEN IN ALKALINE CELLS ABSTRACT OF THE DISCLOSURE: In rechargeable or primary electrochemical cells, hydrogen may evolve. The invention concerns the use of an auxiliary electrode material to catalyze 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 catalyst for the absorption of pressurized hydrogen in the presence of 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.

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