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- W4366352178 abstract "Electrocatalytic nitrate reduction sustainably produces ammonia and alleviates water pollution, yet is still challenging due to the kinetic mismatch and hydrogen evolution competition. Cu/Cu2 O heterojunction is proven effective to break the rate-determining NO3- -to-NO2- step for efficient NH3 conversion, while it is unstable due to electrochemical reconstruction. Here we report a programmable pulsed electrolysis strategy to achieve reliable Cu/Cu2 O structure, where Cu is oxidized to CuO during oxidation pulse, then regenerating Cu/Cu2 O upon reduction. Alloying with Ni further modulates hydrogen adsorption, which transfers from Ni/Ni(OH)2 to N-containing intermediates on Cu/Cu2 O, promoting NH3 formation with a high NO3- -to-NH3 Faraday efficiency (88.0±1.6 %, pH 12) and NH3 yield rate (583.6±2.4 μmol cm-2 h-1 ) under optimal pulsed conditions. This work provides new insights to in situ electrochemically regulate catalysts for NO3- -to-NH3 conversion." @default.
- W4366352178 created "2023-04-21" @default.
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- W4366352178 date "2023-05-08" @default.
- W4366352178 modified "2023-10-16" @default.
- W4366352178 title "Electrical Pulse‐Driven Periodic Self‐Repair of Cu‐Ni Tandem Catalyst for Efficient Ammonia Synthesis from Nitrate" @default.
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- W4366352178 doi "https://doi.org/10.1002/anie.202217337" @default.
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- W4366352178 hasPublicationYear "2023" @default.
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