US3924025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an electrode having a coating of cobalt metatitanate thereon
Assignee: Electronor Corp
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Filing: 1973-07-31
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Granted: 1975-12-02
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Expires: 1993-07-31
Abstract
Abstract A coherent mixture of crystalline cobalt metatitanate with a valve metal oxide-platinum metal oxide solid solution is provided. Typical use of the mixture is as an adherent, electrically-conductive, electrocatalytically-active coating applied to an electrically-conductive substrate for use as an electrode.
Inventors
- 👤 James M Kolb
- 👤 Kevin J O'leary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:39
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091; C25B11/093
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
163 words
A METHOD OF PREPARING AN ELECTRODE WHICH COMPRISES: A. APPLYING A SOLUTION OF SALTS OF TITANIUM, RUTHENIUM AND COBALT TO AN ELECTRICALLY-CONDUCTIVE SUBSTRATE; B. RAPIDLY HEATING THE SUBSTRATE WITH APPLIED SOLUTION TO A TEMPERATURE WITHIN THE RANGE OF 425*-475*C AND IN THE PRESENCE OF OXYGEN C. MAINTAINING THE SUBSTRATE AT THE SAID TEMPERATURE FOR A PERIOD OF TIME SUFFICIENT TO THERMOCHEMICALLY CONVERT THE SALTS TO A COHERENT MIXTURE OF CRYSTALLINE COBALT METATITANATE WITH A VALVE METAL OXIDE-PRECIOUS METAL OXIDE SOLID SOLUTION D. COOLING THE SUBSTRATE; E. APPLYING ANY DESIRED NUMBER OF COATINGS OF SAID SOLUTION IN THE MANNER OF STEPS (A) TO (D) AND, F. AFTER THERMOCHEMICAL CONVERSION OF THE LAST SOLUTION APPLICATION, HEATING THE SUBSTRATE TO A TEMPERATURE OF 525*-575*C FOR FROM 5 TO 10 MINUTES, WHEREBY THERE IS OBTAINED AN ELECTRODE BEARING ON AT LEAST A PORTION OF ITS SURFACE AN ELECTRICALLY-CONDUCTIVE, ELECTROCATALYTICALLY-ACTIVE COATING CONSISTING ESSENTIALLY OF A COHERENT MIXTURE OF CRYSTALLINE COBALT METATITANATE AND A TITANIUM DIOXIDE-RUTHENIUM DIOXIDE SOLID SOLUTION.
Claim 2
Independent Claim
163 words
A METHOD OF PREPARING AN ELECTRODE WHICH COMPRISES: A. APPLYING A SOLUTION OF SALTS OF TITANIUM, RUTHENIUM AND COBALT TO AN ELECTRICALLY-CONDUCTIVE SUBSTRATE; B. RAPIDLY HEATING THE SUBSTRATE WITH APPLIED SOLUTION TO A TEMPERATURE WITHIN THE RANGE OF 425*-475*C AND IN THE PRESENCE OF OXYGEN C. MAINTAINING THE SUBSTRATE AT THE SAID TEMPERATURE FOR A PERIOD OF TIME SUFFICIENT TO THERMOCHEMICALLY CONVERT THE SALTS TO A COHERENT MIXTURE OF CRYSTALLINE COBALT METATITANATE WITH A VALVE METAL OXIDE-PRECIOUS METAL OXIDE SOLID SOLUTION D. COOLING THE SUBSTRATE; E. APPLYING ANY DESIRED NUMBER OF COATINGS OF SAID SOLUTION IN THE MANNER OF STEPS (A) TO (D) AND, F. AFTER THERMOCHEMICAL CONVERSION OF THE LAST SOLUTION APPLICATION, HEATING THE SUBSTRATE TO A TEMPERATURE OF 525*-575*C FOR FROM 5 TO 10 MINUTES, WHEREBY THERE IS OBTAINED AN ELECTRODE BEARING ON AT LEAST A PORTION OF ITS SURFACE AN ELECTRICALLY-CONDUCTIVE, ELECTROCATALYTICALLY-ACTIVE COATING CONSISTING ESSENTIALLY OF A COHERENT MIXTURE OF CRYSTALLINE COBALT METATITANATE AND A TITANIUM DIOXIDE-RUTHENIUM DIOXIDE SOLID SOLUTION.
Claim 3
Dependent Claim
22 words
A method as in claim 1 wherein the titanium, ruthenium and cobalt salts are, respectively, butyl titanate, ruthenium chloride and cobalt chloride.
Claim 4
Dependent Claim
46 words
A method as in claim 1 wherein the titanium, ruthenium and cobalt salts are used in amounts sufficient to provide a mole ratio in solution of titanium; ruthenium plus cobalt within the range of 5:1-1:5 and a ratio of ruthenium; cobalt within the range of 4:1-2:3.
Claim 5
Dependent Claim
15 words
A method as in claim 1 wherein the temperature in Step (b) is about 450*C.
Claim 6
Dependent Claim
15 words
A method as in claim 1 wherein the temperature in Step (f) is about 550*C.
Claim 7
Dependent Claim
16 words
A method as in claim 1 wherein according to Step (e) from 4-12 coats are applied.
Claim 8
Dependent Claim
14 words
A method as in claim 1 wherein the substrate is a valve metal substrate.
Claim 9
Dependent Claim
11 words
A method as in claim 1 wherein the substrate is titanium.
References Cited (Backward Citations)
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US3632498A
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US3810770A
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |