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Continuous-flow electrosynthesis of ammonia by nitrogen reduction and hydrogen oxidation

Fu, Xianbiao ; Pedersen, Jakob B ; Zhou, Yuanyuan ; Saccoccio, Mattia ; Li, Shaofeng ; Sažinas, Rokas ; Li, Katja ; Andersen, Suzanne Z ; Xu, Aoni ; Deissler, Niklas H ; Mygind, Jon Bjarke Valbæk ; Wei, Chao ; Kibsgaard, Jakob ; Vesborg, Peter C K ; Nørskov, Jens K ; Chorkendorff, Ib

Science (American Association for the Advancement of Science), 2023-02, Vol.379 (6633), p.707-712 [Periódico revisado por pares]

United States: The American Association for the Advancement of Science

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Título:
Continuous-flow electrosynthesis of ammonia by nitrogen reduction and hydrogen oxidation
Autor: Fu, Xianbiao ; Pedersen, Jakob B ; Zhou, Yuanyuan ; Saccoccio, Mattia ; Li, Shaofeng ; Sažinas, Rokas ; Li, Katja ; Andersen, Suzanne Z ; Xu, Aoni ; Deissler, Niklas H ; Mygind, Jon Bjarke Valbæk ; Wei, Chao ; Kibsgaard, Jakob ; Vesborg, Peter C K ; Nørskov, Jens K ; Chorkendorff, Ib
Assuntos: Ammonia ; Anodizing ; Catalysts ; Chemical reduction ; Chemical synthesis ; Continuous flow ; Electrochemistry ; Fertilizers ; Gold base alloys ; Lithium ; Lithium ions ; Mass production ; Nitrogen ; Oxidation ; Platinum ; Protons
É parte de: Science (American Association for the Advancement of Science), 2023-02, Vol.379 (6633), p.707-712
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: Ammonia is a critical component in fertilizers, pharmaceuticals, and fine chemicals and is an ideal, carbon-free fuel. Recently, lithium-mediated nitrogen reduction has proven to be a promising route for electrochemical ammonia synthesis at ambient conditions. In this work, we report a continuous-flow electrolyzer equipped with 25-square centimeter-effective area gas diffusion electrodes wherein nitrogen reduction is coupled with hydrogen oxidation. We show that the classical catalyst platinum is not stable for hydrogen oxidation in the organic electrolyte, but a platinum-gold alloy lowers the anode potential and avoids the decremental decomposition of the organic electrolyte. At optimal operating conditions, we achieve, at 1 bar, a faradaic efficiency for ammonia production of up to 61 ± 1% and an energy efficiency of 13 ± 1% at a current density of -6 milliamperes per square centimeter.
Editor: United States: The American Association for the Advancement of Science
Idioma: Inglês

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Continuous-flow electrosynthesis of ammonia by nitrogen reduction and hydrogen oxidation

Fu, Xianbiao ; Pedersen, Jakob B ; Zhou, Yuanyuan ; Saccoccio, Mattia ; Li, Shaofeng ; Sažinas, Rokas ; Li, Katja ; Andersen, Suzanne Z ; Xu, Aoni ; Deissler, Niklas H ; Mygind, Jon Bjarke Valbæk ; Wei, Chao ; Kibsgaard, Jakob ; Vesborg, Peter C K ; Nørskov, Jens K ; Chorkendorff, Ib

United States: The American Association for the Advancement of Science

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