Raney alloy coated cathode for chlor-alkali cells
US4518457A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1982 |
| Grant date | May 21, 1985 |
| Priority date | — |
| Expiry date | Mar 17, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C10/60
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An improved cathode with a conductive metal core and a Raney-type catalytic surface predominantly derived from an adherent Beta nickel (NiAl.sub.3) 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 Ni.sub.x Mo.sub.1-x Al.sub.3 where x is within the range of from about 80 to about 95 weight percent. Also disclosed is a method of producing a low overvoltage cathode. The method includes the steps of taking a Ni-Mo core or substrate 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.