Bismuth Ferrite as an Electrocatalyst for the Electrochemical Nitrate Reduction
Electrochemical nitrate reduction has become an appealing “waste-to-wealth” approach for sustainable NH3 synthesis owing to its mild operating conditions. However, developing catalysts with high activities and Faradaic efficiencies for this complicated eight-electron reaction is a great challenge. H...
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Veröffentlicht in: | Nano letters 2022-07, Vol.22 (13), p.5600-5606 |
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Hauptverfasser: | , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Electrochemical nitrate reduction has become an appealing “waste-to-wealth” approach for sustainable NH3 synthesis owing to its mild operating conditions. However, developing catalysts with high activities and Faradaic efficiencies for this complicated eight-electron reaction is a great challenge. Herein, bismuth ferrite (BiFeO3) flakes, with a distorted perovskite-type structure, are demonstrated to be excellent catalysts for electrochemical NH3 synthesis via nitrate reduction, with a maximum Faradaic efficiency of 96.85%, NH3 yield of 90.45 mg h–1 mgcat –1, at −0.6 V vs. reversible hydrogen electrode. During the nitrate reduction reaction, the crystalline BiFeO3 rapidly converts into an amorphous phase, which is stable in the long term reaction. These results open a new window for rational design of more active and durable electrocatalysts. |
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ISSN: | 1530-6984 1530-6992 |
DOI: | 10.1021/acs.nanolett.2c02026 |