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Copper nanowires decorated with TiO2−x from MXene for enhanced electrocatalytic nitrogen oxidation into nitrate under vacuum assistance

Li, Quan ; Xiao, Zhengting ; Jia, Weina ; Li, Qin ; Li, Xianguo ; Wang, Wentai

Nano research, 2023-10, Vol.16 (10), p.12357-12362 [Periódico revisado por pares]

Beijing: Tsinghua University Press

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Título:
Copper nanowires decorated with TiO2−x from MXene for enhanced electrocatalytic nitrogen oxidation into nitrate under vacuum assistance
Autor: Li, Quan ; Xiao, Zhengting ; Jia, Weina ; Li, Qin ; Li, Xianguo ; Wang, Wentai
Assuntos: Atomic/Molecular Structure and Spectra ; Biomedicine ; Biotechnology ; Bond energy ; Chemistry and Materials Science ; Condensed Matter Physics ; Copper ; Electrodes ; Materials Science ; MXenes ; Nanoparticles ; Nanotechnology ; Nanowires ; Nitrates ; Nitrogen ; Nitrogen fixation ; Nitrogenation ; Open circuit voltage ; Ostwald ripening ; Oxidation ; Oxygen evolution reactions ; Research Article ; Synthesis ; Titanium dioxide ; Vacuum ; Zinc
É parte de: Nano research, 2023-10, Vol.16 (10), p.12357-12362
Descrição: The green synthesis of nitrate (NO 3 − ) via electrocatalytic nitrogen oxidation reaction (NOR) is a promising strategy for artificial nitrogen fixation, which shows great advantages than traditional nitrate synthesis based on Haber–Bosch and Ostwald processes. But the poor N 2 absorption, high bond energy of N≡N (941 kJ·mol −1 ), and competing multi-electron-transfer oxygen evolution reaction (OER) limit the activity and selectivity. Herein, we fabricated MXene-derived irregular TiO 2− x nanoparticles anchored Cu nanowires (Cu-NWs) electrode for efficient electrocatalytic nitrogen oxidation, which exhibits a NO 3 − yield of 62.50μ g ·h −1 ·mg cat −1 and a Faradaic efficiency (FE) of 22.04%, and a significantly enhanced NO 3 − yield of 92.63 μ g ·h −1 ·mg cat −1 , and a FE of 40.58% under vacuum assistance. The TiO 2− x /Cu-NWs electrode also shows excellent reproducibility and stability under optimal experimental conditions. Moreover, a Zn-N 2 reaction device was assembled with TiO 2− x /Cu-NWs as an anode and Zn plate as a cathode, obtaining an extremely high NO 3 − yield of 156.25 μ g ·h −1 ·mg cat −1 . The Zn-nitrate battery shows an open circuit voltage (OCV) of 1.35 V. This work provides novel strategies for enhancing the performance of ambient N 2 oxidation to obtain higher NO 3 − yield.
Editor: Beijing: Tsinghua University Press
Idioma: Inglês

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Copper nanowires decorated with TiO2−x from MXene for enhanced electrocatalytic nitrogen oxidation into nitrate under vacuum assistance

Li, Quan ; Xiao, Zhengting ; Jia, Weina ; Li, Qin ; Li, Xianguo ; Wang, Wentai

Beijing: Tsinghua University Press

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