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US 12,515,207 B2Granted
Metal-metal bonded ammonia oxidation catalysts
AssigneeWisconsin Alumni Research Foundation
InventorsJohn Berry, Christian Wallen, Michael Trenerry, Tristan Brown, Sungho Park
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Abstract
Methods and catalysts for oxidizing ammonia to nitrogen are described. Specifically, diruthenium complexes that spontaneously catalyze this reaction are disclosed. Accordingly, the disclosed methods and catalysts can be used in various electrochemical cell-based energy storage and energy production applications that could form the basis for a potential nitrogen economy.
Claims18
An electrochemical half-cell comprising:
- n anode electrode in contact with a catalyst comprising a diruthenium complex, wherein the catalyst is capable of spontaneously catalyzing the oxidation of NH3 to N2;
- wherein the diruthenium complex comprises a central metal-metal bonded diruthenium of [Ru]2n+, where n is 3-7;
- and wherein the diruthenium complex has the chemical structure:
- wherein:
- L, which may or may not be present, is, if present, a non-competitive ligand;
- each E, which may be the same or different, is independently O, S, NH or NY, where Y is an alkyl or an aryl;
- each X, which may be the same or different, is a steric tuning group;
- and
- R, which may or may not be present, is (if present) an electronic tuning group.
6 more elements
Dependencies are inferred from the claim text.