US3775284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-passivating barrier layer electrodes
Assignee: ELECTRODE Corp A DE CORP
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Filing: 1971-01-28
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Granted: 1973-11-27
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Expires: 1991-01-28
Abstract
Abstract An electrode is provided which resists passivation over long periods of time and hence which is especially well suited for use as an oxygen anode. The electrode comprises 1) an electrically conductive supporting substrate, 2) an intermediate, electrically conductive, barrier layer and 3) an electrocatalytically active, solid solution-type, outer coating. The barrier layer is selected from the group consisting of platinum-iridium alloys and oxides of cobalt, manganese, palladium, lead and platinum.
Inventors
- 👤 J Bennett
- 👤 Leary K O
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:29
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C25B11/093
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
12 words
An electrode as in claim 1 wherein the supporting substrate is titanium.
Claim 2
Dependent Claim
36 words
An electrode as in claim 1 wherein the outer coating is a solid solution of a valve metal oxide and a non-valve metal oxide selected from the group consisting of platinum, palladium, iridium, rhodium and ruthenium.
Claim 3
Dependent Claim
19 words
An electrode of claim 3 wherein the outer coating is a solid solution of titanium dioxide and ruthenium oxide.
Claim 4
Dependent Claim
90 words
In a process for the production of a composite electrode comprising an electrically conductive supporting substrate and an electrically conductive, electro-catalytically active solid solution-type outer coating consisting of at least one valve metal oxide and at least one oxide of a metal selected from the group consisting of platinum, palladium, iridium, ruthenium, rhodium, osmium, molybdenum, tin, tungsten, vanadium, chromium, rhenium and manganese, the improvement which comprises providing said electrode with a relatively thin, intermediate, electrically-conductive, relatively oxygen-impermeable, barrier layer selected from the group consisting of oxides of cobalt and lead.
Claim 5
Dependent Claim
40 words
A method as in claim 5 wherein the outer coating is provided by the thermochemical co-deposition and decomposition of a mixture comprising a valve metal oxide and at least one platinum group metal oxide, thereby obtaining a solid solution-type coating.
Claim 6
Dependent Claim
107 words
In a method of conducting an electrochemical reaction wherein oxygen is liberated at the anode, the improvement which comprises using as said anode a composite electrode comprising: a. an electrically conductive supporting substrate, b. a relatively thin, intermediate, electrically conductive, relatively oxygen-impermeable, barrier layer consisting essentially of one oxide of the group consisting of oxides of cobalt and lead and c. an electrically-conductive, electrocatalytically active, electrolyte resistant, solid solution-type outer coating consisting of at least one valve metal oxide and at least one oxide of a metal selected from the group consisting of platinum, palladium, iridium, ruthenium, rhodium, osmium, molybdenum, tin, tungsten, vanadium, chromium, rhenium and manganese.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |