US4363707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activated nickel-containing electrode and its use particularly for water electrolysis
Assignee: IFP Energies nouvelles
•
Filing: 1980-06-18
•
Granted: 1982-12-14
•
Expires: 2000-06-18
Abstract
Abstract A low polarization electrode which is stable and safe to use, is manufactured by forming a layer of divided nickel or nickel alloy on an electricity-conducting substrate and thereafter sulfiding the surface of the resultant material. For example, a Raney nickel alloy is deposited on the substrate, the alloy metal is removed and the resultant material is sulfided.
Inventors
- 👤 Michel Prigent
- 👤 Lucien Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:34
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/98; C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36; Y02E60/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
87 words
A safe, stable low polarization electrode, produced by the process comprising the steps of: (a) sulfiding a layer of divided metallic nickel or nickel-containing metal alloy consisting essentially of nickel and 0-80% by weight of Fe, Co, Cr or Mn and/or 0-15% by weight of Mg, Al, Si, Ti, V, Cu, Zn, Zr, Nb, Mo, Sn, La, Ta, W, Pb or Bi, with respect to the nickel, said layer being previously deposited on an electrically conductive substrate, under conditions producing substantially only superficial sulfur deposition; and thereafter
Claim 2
Dependent Claim
87 words
A safe, stable low polarization electrode, produced by the process comprising the steps of: (a) sulfiding a layer of divided metallic nickel or nickel-containing metal alloy consisting essentially of nickel and 0-80% by weight of Fe, Co, Cr or Mn and/or 0-15% by weight of Mg, Al, Si, Ti, V, Cu, Zn, Zr, Nb, Mo, Sn, La, Ta, W, Pb or Bi, with respect to the nickel, said layer being previously deposited on an electrically conductive substrate, under conditions producing substantially only superficial sulfur deposition; and thereafter
Claim 3
Dependent Claim
19 words
(b) heating the resultant superficially sulfided electrode at 200°-600° C. in an inert gas atmosphere or in a vacuum.
Claim 4
Dependent Claim
19 words
(b) heating the resultant superficially sulfided electrode at 200°-600° C. in an inert gas atmosphere or in a vacuum.
Claim 5
Dependent Claim
22 words
An electrode according to claim 1, wherein step (a) is effected by contacting said layer with an aqueous solution of hydrogen sulfide.
Claim 6
Dependent Claim
28 words
An electrode according to claim 2, wherein said aqueous solution of hydrogen sulfide is a solution in aqueous ammonia, the sulfide species in said solution being ammonium sulfide.
Claim 7
Dependent Claim
19 words
An electrode according to claim 1, wherein said nickel-containing metal alloy is an alloy of nickel, cobalt and titanium.
Claim 8
Dependent Claim
18 words
An electrode according to claim 1, wherein step (a) is effected by contacting said layer with elemental sulfur.
Claim 9
Dependent Claim
19 words
An electrode according to claim 1, wherein step (a) is effected by contacting said layer with gaseous hydrogen sulfide.
Claim 10
Dependent Claim
17 words
An electrode according to claim 1, wherein in step (b), the heating is effected at 250°-450° C.
Claim 11
Dependent Claim
13 words
The process of claim 1, wherein said electrode is used as a cathode.
Claim 12
Dependent Claim
22 words
In the electrolysis of water using at least one electrode, the improvement comprising using as said electrode the electrode of claim 1.
References Cited (Backward Citations)
DE411528C
Cited
DE414969C
Cited
FR729357A
Cited
US3637437A
Cited
US3926675A
Cited
US3997478A
Cited
US4255247A
Cited
US4190516A
Cited
US4224133A
Cited
US4132620A
Cited
US4200515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |