Raney alloy coated cathode for chlor-alkali cells
US4240895A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1979 |
| Grant date | Dec 23, 1980 |
| Priority date | — |
| Expiry date | Mar 29, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25B11/091
- 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 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 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-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 NaAl.sub.3 structure and then leaching out the Al to produce a Raney surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.