US4127468A
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Process for preparing a metal electrode
Assignee: DSM BV
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Filing: 1976-03-09
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Granted: 1978-11-28
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Expires: 1996-03-09
Abstract
Abstract Metal electrodes are prepared by contacting a basis-metal electrode with a solution which contains an alloying element compound, said basis-metal electrode comprising a basis-metal which is present in a finely divided or porous state and is selected from the group consisting of the noble metals from the Groups IB, IIB or VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying element being selected from the group consisting of an element from Groups IIIA, IVA, VA, VIA, VIII, IB, IIB, VIIB or combinations thereof of the Periodic Table of the Elements; and reducing in situ said alloying-element compound to form the free-alloying element whereby said alloying element forms an alloy with said basis-metal.
Inventors
- 👤 Marinus Alfenaar
- 👤 Cornelis G. M. van de Moesdijk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:44
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/88; H01M4/8825; H01M4/8846; H01M4/885; C; C25; C25B; C25B11/00; C25B11/02; H01M4/8803; H01M4/8807; H01M4/90; H01M4/92; H01M4/921; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basis-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in a finely-divided or porous state and is selected from the group consisting of noble metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group VIIB of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
Claim 2
Dependent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basis-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in a finely-divided or porous state and is selected from the group consisting of noble metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group VIIB of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
Claim 3
Dependent Claim
21 words
A process according to claim 1 wherein said basis-metal is selected from the group consisting of palladium, platinum, palladium-platinum or platinum-iridium.
Claim 4
Dependent Claim
11 words
A process according to claim 1 wherein said alloying-element is rhenium.
Claim 5
Dependent Claim
23 words
A process according to claim 1 wherein the pH of said solution ranges from about 1 to about 5 during the reduction step.
Claim 6
Dependent Claim
21 words
A process according to claim 1 wherein the reducing step is continued after the solution is depleted of said alloying element.
Claim 7
Dependent Claim
17 words
A process according to claim 1 wherein the reduction is carried out with a chemical reducing agent.
Claim 8
Dependent Claim
12 words
A process according to claim 6 wherein the chemical-reducing agent is hydrogen.
Claim 9
Dependent Claim
36 words
A process for preparing a gas-diffusion electrode wherein a basis metal electrode composed of a hydrophobic porous layer of polytetrafluoroethylene and a layer of active carbon having a basis-metal thereon is treated according to claim 1.
Claim 10
Dependent Claim
16 words
A process according to claim 8 wherein said basis-metal is platinum-iridium and said alloying-element is rhenium.
Claim 11
Dependent Claim
28 words
A process for forming a porous liquid flow-through electrode according to claim 1 wherein reducing in situ is accomplished by electrolysis, thereby forming hydrogen at the electrode surface.
Claim 12
Dependent Claim
16 words
A process according to claim 10 wherein said basis-metal is platinum-iridium and said alloying-element is rhenium.
Claim 13
Dependent Claim
16 words
A process according to claim 1 wherein said basis-metal is platinum-iridium and said alloying-element is rhenium.
Claim 14
Dependent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basis-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in a finely-divided or porous state and is selected from the group consisting of noble metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group IIIA of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
Claim 15
Dependent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basis-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in a finely-divided or porous state and is selected from the group consisting of noble metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group IIIA of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
Claim 16
Dependent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basis-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in a finely-divided or porous state and is selected from the group consisting of noble metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group IVA of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
Claim 17
Dependent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basis-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in a finely-divided or porous state and is selected from the group consisting of noble metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group IVA of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
Claim 18
Dependent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basic-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in a finely-divided or porous state and is selected from the group consisting of noble metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group VA of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
Claim 19
Dependent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basic-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in a finely-divided or porous state and is selected from the group consisting of noble metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group VA of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
Claim 20
Dependent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basis-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in a finely-divided or porous state and is selected from the group consisting of noble metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group VIA of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
Claim 21
Dependent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basis-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in a finely-divided or porous state and is selected from the group consisting of noble metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group VIA of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
Claim 22
Dependent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basis-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in a finely-divided or porous state and is selected from the group consisting of noble metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group VIII of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
Claim 23
Dependent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basis-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in a finely-divided or porous state and is selected from the group consisting of noble metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group VIII of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
Claim 24
Dependent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basis-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in the finely-divided or porous state and is selected from the group consisting of noble metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group IB of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
Claim 25
Dependent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basis-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in the finely-divided or porous state and is selected from the group consisting of noble metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group IB of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
Claim 26
Dependent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basis-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in a finely-divided or porous state and is selected from the group consisting of nobel metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group IIB of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
Claim 27
Dependent Claim
114 words
A process for the production of a metal electrode comprising: (a) contacting a basis-metal electrode with a solution which contains an alloying-element compound, said basis-metal electrode comprising a basis-metal which is present in a finely-divided or porous state and is selected from the group consisting of nobel metals from Group VIII of the Periodic Table of the Elements or an alloy of at least one of the metals, said alloying-element being selected from the group consisting of an element from Group IIB of the Periodic Table of the Elements or combinations thereof; and (b) reducing in situ said alloying-element compound to form the free alloying-element whereby said alloying-element forms an alloy with said basis-metal.
References Cited (Backward Citations)
US3506494A
Cited
US3992271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-27 | 1982-05-29 | 1982-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-27 | 1986-05-29 | 1986-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-27 | 1990-05-29 | 1990-11-28 | $7700.00 | Window Closed / Lapsed |