Electrolytic method of producing an active cobalt electrode for the evolution of hydrogen
US4183790A · kind A · utility
3Cited by
2References
18Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | May 26, 1978 |
| Grant date | Jan 15, 1980 |
| Priority date | — |
| Expiry date | May 26, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/50
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of producing a cobalt plated electrode is disclosed. The method comprises subjecting an electrically conductive substrate to electrolytic plating in an aqueous bath containing cobalt ions and a reducing agent selected from the group consisting of hypophosphite salts, phosphite salts, formaldehyde and hydrazine in the concentration of 2 to 100 gpl. Ammonium ions and a weak complexing agent are preferably added to the bath. The current density is in the range of 0.2 to 150 mA/cm.sup.2 and the temperature of the bath between 20.degree. and 80.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.