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BiVO 4/TiO 2 heterojunction with rich oxygen vacancies for enhanced electrocatalytic nitrogen reduction reaction

The large-scale production of ammonia mainly depends on the Haber-Bosch process, which will lead to the problems of high energy consumption and carbon dioxide emission. Electrochemical nitrogen fixation is considered to be an environmental friendly and sustainable process, but its efficiency largely...

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Bibliographic Details
Published in:Frontiers of physics 2021, Vol.16 (5), p.53503
Main Authors: Liu, Yunliang, Deng, Peiji, Wu, Ruqiang, Geioushy, Ramadan A., Li, Yaxi, Liu, Yixian, Zhou, Fengling, Li, Haitao, Sun, Chenghua
Format: Article
Language:English
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Summary:The large-scale production of ammonia mainly depends on the Haber-Bosch process, which will lead to the problems of high energy consumption and carbon dioxide emission. Electrochemical nitrogen fixation is considered to be an environmental friendly and sustainable process, but its efficiency largely depends on the activity and stability of the catalyst. Therefore, it is imperative to develop highefficient electrocatalysts in the field of nitrogen reduction reaction (NRR). In this paper, we developed a BiVO 4/TiO 2 nanotube (BiVO 4/TNT) heterojunction composite with rich oxygen vacancies as an electrocatalytic NRR catalyst. The heterojunction interface and oxygen vacancy of BiVO 4/TNT can be the active site of N 2 dynamic activation and proton transition. The synergistic effect of TiO 2 and BiVO 4 shortens the proton transport path and reduces the over potential of chemical reaction. BiVO 4/TNT has high ammonia yield of 8.54 μg·h −1·cm −2 and high Faraday efficiency of 7.70% in −0.8 V vs. RHE in 0.1 M Na 2SO 4 solution.
ISSN:2095-0462
2095-0470
DOI:10.1007/s11467-021-1067-8