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

C - Chemistry, Metallurgy

25

B

204/192

C25B 11/06 (2006.01)

Patent

CA 1161791

IMPROVED RANEY ALLOY COATED CATHODE FOR CHLOR-ALKALI CELLS Abstract of the Disclosure An improved cathode with a conductive metal core and a Raney-type catalytic surface predominantly derived from an adherent Beta Nickel (NiAl3) crystalline precursory outer portion of the metal core is disclosed. The precursory outer portion preferably has molybdenum added to give a precursor alloy having the formula NixMol xAl3 where x is within the range of from about 5 to about 15 weight percent. Also dis- closed is a method of producing a low overvoltage cathode. The method includes the steps of taking a Ni-Mo core or sub- strate having about 5-20 weight percentage of Mo and coating it with aluminum then heat treating to form a Ni-Mo-Al alloy with mostly a Beta Nickel structure and then leaching out the Al to produce a Raney surface.

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