US5399245A
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Methods of indirect electrochemistry using ionomer coated electrodes
Assignee: North Carolina State University
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Filing: 1993-09-03
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Granted: 1995-03-21
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Expires: 2013-09-03
Abstract
Abstract Novel methods of indirect electrochemistry are provided. The methods use ionomer coated electrodes for regeneration of the redox reagent in the indirect electrochemical process. The electrode may be either directly coated with a thin ionomer coating, or alternatively may electrodeposited within an ionomer coated electronically conductive substrate. Ionomers used to coat the electrodes of the subject method include Nafion TM and Tosflex TM .
Inventors
- 👤 Peter S. Fedkiw, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:04
CPC Classifications
C; C25; C25B; C25B11/00; C25B11/02; C25B9/00; C25B9/17; C25B9/19; C25B9/23
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
104 words
A method of indirect electrochemistry, said method comprising the steps of: contacting an aqueous phase with an organic phase, wherein said aqueous phase comprises a redox reagent and said organic phase comprises an organic reactant, to form a spent redox reagent and a product; separating said aqueous phase from said organic phase; and contacting said aqueous phase with an electrode coated with an ionomer film and a counter electrode, wherein the potential between said ionomer coated electrode and counter electrode is sufficient to regenerate said spent redox reagent at said ionomer coated electrode; whereby said spent redox reagent is converted to said redox reagent.
Claim 2
Independent Claim
104 words
A method of indirect electrochemistry, said method comprising the steps of: contacting an aqueous phase with an organic phase, wherein said aqueous phase comprises a redox reagent and said organic phase comprises an organic reactant, to form a spent redox reagent and a product; separating said aqueous phase from said organic phase; and contacting said aqueous phase with an electrode coated with an ionomer film and a counter electrode, wherein the potential between said ionomer coated electrode and counter electrode is sufficient to regenerate said spent redox reagent at said ionomer coated electrode; whereby said spent redox reagent is converted to said redox reagent.
Claim 3
Dependent Claim
12 words
The method according to claim 1, wherein said ionomer film is cationic.
Claim 4
Dependent Claim
15 words
The method according to claim 2, wherein said ionomer film is a cationic perfluorinated membrane.
Claim 5
Dependent Claim
12 words
The method according to claim 1, wherein said ionomer film is anionic.
Claim 6
Dependent Claim
15 words
The method according to claim 4, wherein said ionomer film is an anionic perfluorinated membrane.
Claim 7
Dependent Claim
19 words
The method according to claim 1, wherein said ionomer film comprises a hybrid film of anionic and cationic constituents.
Claim 8
Dependent Claim
20 words
The method according to claim 6, wherein said hybrid film comprises a cationic perfluorinated membrane and an anionic perfluorinated membrane.
Claim 9
Dependent Claim
24 words
The method according to claim 1, wherein said ionomer film coats said electrode in a thickness ranging from about 0.01 μm to 10 μm.
Claim 10
Dependent Claim
11 words
The method according to claim 7, wherein said electrode is platinum.
Claim 11
Dependent Claim
15 words
The method according to claim 7, wherein said ionomer film is a cationic perfluorinated membrane.
Claim 12
Dependent Claim
15 words
The method according to claim 7, wherein said ionomer film is an anionic perfluorinated membrane.
Claim 13
Independent Claim
116 words
A method of indirect electrochemistry, said method comprising the steps of: contacting an aqueous phase comprising a redox reagent and an organic phase comprising an organic reactant to form a spent redox reagent and product; separating said aqueous phase from said organic phase; and contacting said aqueous phase with a cationic perfluorinated membrane coated platinum electrode, wherein the thickness of said cationic perfluorinated membrane coating ranges from about 0.01 μm to 10 μm, and a counter electrode, wherein the potential between said cationic perfluorinated membrane coated electrode and counter electrode is sufficient to regenerate said spent redox reagent at said cationic perfluorinated membrane coated electrode; whereby said spent redox reagent is converted to said redox reagent.
Claim 14
Independent Claim
116 words
A method of indirect electrochemistry, said method comprising the steps of: contacting an aqueous phase comprising a redox reagent and an organic phase comprising an organic reactant to form a spent redox reagent and product; separating said aqueous phase from said organic phase; and contacting said aqueous phase with a cationic perfluorinated membrane coated platinum electrode, wherein the thickness of said cationic perfluorinated membrane coating ranges from about 0.01 μm to 10 μm, and a counter electrode, wherein the potential between said cationic perfluorinated membrane coated electrode and counter electrode is sufficient to regenerate said spent redox reagent at said cationic perfluorinated membrane coated electrode; whereby said spent redox reagent is converted to said redox reagent.
Claim 15
Dependent Claim
33 words
The method according to claim 1, wherein said electrode comprises: a substrate; an ionomer film coating said substrate; and electrodes electrodeposited within said ionomer film, wherein said electrodes are anchored to said substrate.
Claim 16
Dependent Claim
14 words
A method according to claim 13, wherein said substrate comprises an electronically conductive substrate.
Claim 17
Dependent Claim
15 words
A method according to claim 13, wherein said ionomer film is a cationic perfluorinated membrane.
Claim 18
Dependent Claim
11 words
A method according to claim 13, wherein said electrode comprises platinum.
Claim 19
Independent Claim
126 words
A method of indirect electrochemistry, said method comprising the steps of: contacting an aqueous phase comprising a redox reagent and an organic phase comprising an organic reactant to form a spent redox reagent and product; separating said aqueous phase from said organic phase; and contacting said aqueous phase to an ionomer coated electrode and a counter electrode, wherein the potential between said ionomer coated electrode and counter electrode is sufficient to regenerate said spent redox reagent at said electrode, wherein said ionomer coated electrode comprises an electronically conductive substrate, a cationic perfluorinated membrane film and an electrode, wherein said electrode is electrodeposited in said cationic perfluorinated membrane film and anchored to said electronically conductive substrate; whereby said spent redox reagent is converted to said redox reagent.
Claim 20
Independent Claim
126 words
A method of indirect electrochemistry, said method comprising the steps of: contacting an aqueous phase comprising a redox reagent and an organic phase comprising an organic reactant to form a spent redox reagent and product; separating said aqueous phase from said organic phase; and contacting said aqueous phase to an ionomer coated electrode and a counter electrode, wherein the potential between said ionomer coated electrode and counter electrode is sufficient to regenerate said spent redox reagent at said electrode, wherein said ionomer coated electrode comprises an electronically conductive substrate, a cationic perfluorinated membrane film and an electrode, wherein said electrode is electrodeposited in said cationic perfluorinated membrane film and anchored to said electronically conductive substrate; whereby said spent redox reagent is converted to said redox reagent.
References Cited (Backward Citations)
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