Methods of indirect electrochemistry using ionomer coated electrodes
AssigneeNorth Carolina State University
InventorPeter S. Fedkiw, Jr.
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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.RTM. and Tosflex.RTM..
Claims17
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.
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 .mu.m to 10 .mu.m, 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.
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.
Dependencies are inferred from the claim text.