Patent US4031291A successfully refreshed from Google Patents.
US4031291A
Expired / Lapsed
US
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Hydrogen-oxidizing catalyst, and fuel cell electrode using same
Assignee: Individual
•
Filing: 1976-04-05
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Granted: 1977-06-21
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Expires: 1996-04-05
Abstract
Abstract A hydrogen-oxidizing catalyst, comprising a body of yttrium coated with a thin surface layer of copper or platinum. The catalyst is preferably in powder form, and is especially useful as the catalyst at the hydrogen electrode of a fuel cell. The copper-yttrium combination shows better catalytic activity than shiny platinum in terms of current density for a given anode voltage, and the platinum-yttrium combination is even better, although more expensive than the Cu-Y combination.
Inventors
- 👤 Malcolm A. Fullenwider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:34
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/90; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
18 words
A hydrogen-oxidizing catalyst, comprising a body of yttrium having thereon a thin surface layer of copper or platinum.
Claim 2
Dependent Claim
18 words
A hydrogen-oxidizing catalyst, comprising a body of yttrium having thereon a thin surface layer of copper or platinum.
Claim 3
Dependent Claim
18 words
The catalyst of claim 1, wherein said layer is from 1 to about 10 atomic layers in thickness.
Claim 4
Dependent Claim
18 words
The catalyst of claim 2, in which said layer is about 1 to 3 atomic layers in thickness.
Claim 5
Dependent Claim
13 words
The catalyst of claim 1, in which said layer is a plated layer.
Claim 6
Dependent Claim
13 words
The catalyst of claim 4, in which said layer is an electroless-plated layer.
Claim 7
Dependent Claim
13 words
The catalys of claim 4, in which said layer is an electrodeposited layer.
Claim 8
Dependent Claim
12 words
The catalyst of claim 1, wherein said body is a powder-sized particle.
Claim 9
Dependent Claim
24 words
A hydrogen-oxidizing electrode of a fuel cell, comprising as a catalyst a body of yttrium having a surface layer of copper or platinum thereon.
Claim 10
Dependent Claim
24 words
A hydrogen-oxidizing electrode of a fuel cell, comprising as a catalyst a body of yttrium having a surface layer of copper or platinum thereon.
Claim 11
Dependent Claim
15 words
The electrode of claim 8, wherein said layer is a few atomic layers in thickness.
Claim 12
Dependent Claim
14 words
The electrode of claim 9, wherein said body is a particle of powder size.
Claim 13
Dependent Claim
22 words
A hydrogen-oxidizing catalyst comprising a powder of particles each comprising yttrium substantially completely covered with a thin layer of copper or platinum.
Claim 14
Dependent Claim
22 words
A hydrogen-oxidizing catalyst comprising a powder of particles each comprising yttrium substantially completely covered with a thin layer of copper or platinum.
Claim 15
Dependent Claim
18 words
The catalyst of claim 11, in which said layer is about 1 to 10 atomic layers in thickness.
Claim 16
Dependent Claim
26 words
A fuel cell electrode comprising: a porous electrode loaded with a powder comprising particles of yttrium coated with a thin surface layer of copper or platinum.
Claim 17
Dependent Claim
26 words
A fuel cell electrode comprising: a porous electrode loaded with a powder comprising particles of yttrium coated with a thin surface layer of copper or platinum.
Claim 18
Dependent Claim
19 words
The anode of claim 13, wherein said surface layer is from about 1 to 10 atomic layers in thickness.
Claim 19
Dependent Claim
17 words
The anode of claim 14, wherein said thickness is from about 1 to about 3 atomic layers.
References Cited (Backward Citations)
US2204733A
Cited
US3679773A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |