Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 10, Pages 2680-2683Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201612500
Keywords
ammonia; fuel cells; Haber-Bosch process; nitrogen reduction; nitrogenase
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Funding
- Marie Curie-Sklodowska Individual Fellowship (Global) under the European Commission's Horizon Framework [654836]
- Army Research Office MURI
- Spanish MINECO/FEDER, EU project [CTQ2015-71290-R]
- Marie Curie Actions (MSCA) [654836] Funding Source: Marie Curie Actions (MSCA)
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Nitrogenases are the only enzymes known to reduce molecular nitrogen (N-2) to ammonia (NH3). By using methyl viologen (N, N'-dimethyl-4,4'-bipyridinium) to shuttle electrons to nitrogenase, N-2 reduction to NH3 can be mediated at an electrode surface. The coupling of this nitrogenase cathode with a bioanode that utilizes the enzyme hydrogenase to oxidize molecular hydrogen (H-2) results in an enzymatic fuel cell (EFC) that is able to produce NH3 from H-2 and N-2 while simultaneously producing an electrical current. To demonstrate this, a charge of 60 mC was passed across H-2/ N-2 EFCs, which resulted in the formation of 286 nmol NH3 mg (-1) MoFe protein, corresponding to a Faradaic efficiency of 26.4%.
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