US4806515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ternary fuel cell catalyst containing platinum and gallium
Assignee: UTC Power Corp
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Filing: 1987-11-16
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Granted: 1989-02-21
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Expires: 2007-11-16
Abstract
Abstract An improved ternary alloy catalyst for fuel cells containing platinum and gallium. The method of fabricating the catalyst in a high surface area supportive form is also described. The resultant fuel cell catalyst displays a substantial resistance to sintering during operation combined with a resistance to a chemical dissolution during operation. These enhancements permit improved long-term operation of fuel cells.
Inventors
- 👤 Francis J. Luczak
- 👤 Douglas A. Landsman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:43
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8933; B01J23/896; B01J23/38; B01J23/54; B01J23/56; B01J23/62
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
64 words
A supported ternary metal catalyst comprising a catalytically active metallic composition consisting essentially of at least about 50 atomic percent platinum, gallium and at least one material selected from the group consisting of chromium, cobalt, nickel and mixtures thereof, said catalytically active composition being supported on a carbonaceous material and displaying at least 30 meters 2 surface area per gram of catalytically active material.
Claim 2
Dependent Claim
64 words
A supported ternary metal catalyst comprising a catalytically active metallic composition consisting essentially of at least about 50 atomic percent platinum, gallium and at least one material selected from the group consisting of chromium, cobalt, nickel and mixtures thereof, said catalytically active composition being supported on a carbonaceous material and displaying at least 30 meters 2 surface area per gram of catalytically active material.
Claim 3
Dependent Claim
14 words
A catalyst as in claim 1 containing from 5% to 20 atomic % gallium.
Claim 4
Dependent Claim
13 words
A catalyst as in claim 1 in which the third element is chromium.
Claim 5
Dependent Claim
19 words
The ternary catalyst as in claim 1 in which the third element is a mixture of cobalt and chromium.
References Cited (Backward Citations)
US4165983A
Cited
US4316944A
Cited
JPS5743946A
Cited
US4447506A
Cited
EP0149293A1
Cited
JPS6134137A
Cited
JPS61270349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |