US4179350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytically innate electrode(s)
Assignee: Dow Chemical Co
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Filing: 1978-09-05
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Granted: 1979-12-18
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Expires: 1998-09-05
Abstract
Abstract An innate catalytically-active electrode, especially well suited for the electroreduction of oxygen in alkaline media, is comprised at least partially of a substantial proportion of a metal phthalocyanine in dry powder form compounded in intimate mixture with a finely comminutated, particulate metal all fabricated together in an integral porous body form of structure.
Inventors
- 👤 Gary A. Deborski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:19
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; C; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25C; C25C7/00; C25C7/02; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
76 words
An integral, catalytically-active porous electrode body formed of: a shaped mass of compacted, integrated powder comprised of an intimate, substantially uniform admixture of: a preponderant proportion of said mass of finely communitated, particulate, metal powder; and a minor proportion of an electrocatalytic metal phthalocyanine powder; said mass being cohesively bonded together by consolidation of the individual metal phthalocyanine powder and metal particles therein so as to leave internal pores and interstitial passageway voids in said body.
Claim 2
Dependent Claim
76 words
An integral, catalytically-active porous electrode body formed of: a shaped mass of compacted, integrated powder comprised of an intimate, substantially uniform admixture of: a preponderant proportion of said mass of finely communitated, particulate, metal powder; and a minor proportion of an electrocatalytic metal phthalocyanine powder; said mass being cohesively bonded together by consolidation of the individual metal phthalocyanine powder and metal particles therein so as to leave internal pores and interstitial passageway voids in said body.
Claim 3
Dependent Claim
33 words
The electrode body of claim 1, wherein the powder mixture in said shaped mass contains at least about 1 weight percent, based on the weight of the mass, of said metal phthalocyanine powder.
Claim 4
Dependent Claim
20 words
The electrode body of claim 2 made with between about 2 and 20 weight percent of said metal phthalocyanine powder.
Claim 5
Dependent Claim
24 words
The electrode body of claim 2, wherein the compacted powder in said shaped mass comprises a mixture of said metal phthalocyanine and nickel powder.
Claim 6
Dependent Claim
34 words
An electrode body according to that of claim 4, wherein said powder mixture of metal phthalocyanine powder and nickel powder contains at about 10 weight percent, based on total mixture weight, of said phthalocyanine.
Claim 7
Dependent Claim
41 words
An electrode body according to that of claim 2, wherein said metal phthalocyanine is one or a mixture of those selected from the group consisting of the phthalocyanines of cadmium, cobalt, copper, gallium, iridium, iron, magnesium, manganese, nickel, silver and zinc.
Claim 8
Dependent Claim
18 words
The electrode body of claim 1, wherein the metal phthalocyanine powder in said shaped mass is cobalt phthalocyanine.
Claim 9
Dependent Claim
33 words
An electrode body according to that of claim 1, wherein the porosity thereof is between about 30 and about 90 percent of void space in the total solid geometrical volume of the body.
Claim 10
Dependent Claim
33 words
An electrode body according to that of claim 1, wherein the porosity thereof is between about 65 and about 85 percent of void space in the total solid geometrical volume of the body.
Claim 11
Dependent Claim
39 words
An electrode body according to that of claim 9, wherein the porosity thereof is such that the interstitial passageways therein have an average nominal pore size diameter or equivalent measure that is between about 0.1 and about 12 microns.
Claim 12
Dependent Claim
35 words
An electrode body in accordance with that of claim 1, and including, in combination therewith and in addition thereto; means for structurally physically reinforcing said compacted mass of admixed particulate metal and metal phthalocyanine powders.
Claim 13
Dependent Claim
22 words
An electrode body in accordance with that of claim 11, wherein said reinforcing means is a supporting foraminous sheet securing said body.
Claim 14
Dependent Claim
26 words
An electrode body in accordance with that of claim 11, wherein said reinforcing means is an enveloping foraminous screen cage-like enclosure for and about said body.
Claim 15
Dependent Claim
38 words
The electrode body of claim 1, wherein said mass is cohesively bonded together by pressurized consolidation under physical densification to an apparent density that is less than the theoretically attainable density of the involved metal in the mass.
References Cited (Backward Citations)
US3772201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |