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Bioelectrochemical Haber–Bosch Process: An Ammonia‐Producing H2/N2 Fuel Cell

AuthorsMilton, Ross D.; Cai, Rong; Abdellaoui, Sofiene; Leech, Donal; López de Lacey, Antonio ; Pita, Marcos ; Minteer, Shelley
Issue Date1-Mar-2017
PublisherJohn Wiley & Sons
CitationAngewandte Chemie - International Edition 56(10): 2680- 2683 (2017)
AbstractNitrogenases are the only enzymes known to reduce molecular nitrogen (N2) to ammonia (NH3). By using methyl viologen (N,N′‐dimethyl‐4,4′‐bipyridinium) to shuttle electrons to nitrogenase, N2 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 (H2) results in an enzymatic fuel cell (EFC) that is able to produce NH3 from H2 and N2 while simultaneously producing an electrical current. To demonstrate this, a charge of 60 mC was passed across H2 /N2 EFCs, which resulted in the formation of 286 nmol NH3 mg−1 MoFe protein, corresponding to a Faradaic efficiency of 26.4 %.
Publisher version (URL)https://doi.org/10.1002/anie.201612500
Appears in Collections:(ICP) Artículos
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