Raney alloy coated cathode for chlor-alkali cells

Details Raney alloy coated cathode for chlor-alkali cells Raney alloy coated cathode for chlor-alkali cells

1981-11-23

1983-12-06

Edmundson, F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204293, 429 44, 502101, 502301, C25B 1108, B01J 3500

Patent

active

044192088

ABSTRACT:
An improved cathode with a conductive metal core and a Raney-type catalytic surface predominantly derived from an adherent Beta (NiAl.sub.3) crystalline precursory outer portion of the metal core is disclosed. Further, the precursory outer portion preferably has ruthenium added to give a precursor alloy having the formula (Ni-Ru)Al.sub.3 where the ruthenium content of the nickel-ruthenium portion is within the range of from about 5 to about 15 weight percent. Also disclosed is a method of producing a low overvoltage cathode. The method includes the steps of taking a Ni-Ru alloy core or substrate and coating it with aluminum, then heat treating to form a Ni-Ru-Al ternary alloy with mostly a Beta structure and then leaching out the Al to produce a Raney surface.

REFERENCES:
patent: 3379635 (1968-04-01), von Doehren et al.
patent: 4170536 (1979-10-01), Kawasaki et al.

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