Citation: Tao Feng, Fengting Li, Xiaojun Hu, Ying Wang. Selective electroreduction of nitrate to ammonia via NbWO₆ perovskite nanosheets with oxygen vacancy[J]. Chinese Chemical Letters, ;2023, 34(5): 107862. doi: 10.1016/j.cclet.2022.107862 shu

Selective electroreduction of nitrate to ammonia via NbWO₆ perovskite nanosheets with oxygen vacancy

Tao Feng ^a ,
Fengting Li ^{b, c} ,
Xiaojun Hu ^{a, *,} ,
Ying Wang ^{b, c, *,}

a.
School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
b.
State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
c.
Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China

hu-xj@mail.tsinghua.edu.cn

yingwang@tongji.edu.cn

Received Date: 4 June 2022
Revised Date: 10 September 2022
Accepted Date: 26 September 2022
Available Online: 28 September 2022

Figures(5)

Electrocatalytic nitrate reduction to ammonia (NRA) under ambient conditions is significant for carbon-neutral synthetic fuels. Nevertheless, the lack of efficient electrocatalysts with tunable nanostructure for NRA remains a grand challenge. Herein, NbWO₆ nanosheets with oxygen vacancy (NbWO_6-x) was demonstrated via thermal treatment and exfoliation with NH₃ selectivity of 86.8% and Faradaic efficiency of 85.7% toward NRA. ¹H nuclear magnetic resonance spectra coupled with ¹⁵N isotope labeling experiments proved that NH₃ originated from NO₃⁻. The function of oxygen vacancy was revealed by computational studies in NRA. Moreover, the reaction mechanism and pathway of NRA could be deduced based on the results of online differential electrochemical mass spectrometry (DEMS). This work provides a selective NH₃ generation strategy to decarbonize the energy-chemical sector, bridging the gap between batteries and biofuels.
- Nitrate reduction,
- Ammonia generation,
- NbWO_6-x nanosheets,
- Oxygen vacancy,
- Adsorption energy
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沈阳化工大学材料科学与工程学院沈阳 110142

Selective electroreduction of nitrate to ammonia via NbWO6 perovskite nanosheets with oxygen vacancy

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通讯作者: 陈斌, bchen63@163.com

Selective electroreduction of nitrate to ammonia via NbWO₆ perovskite nanosheets with oxygen vacancy