材料科学
催化作用
氨生产
电化学
氧气
化学工程
氮气
氨
异质结
析氧
无机化学
光化学
化学
光电子学
电极
物理化学
工程类
有机化学
生物化学
作者
Yunliang Liu,Peiji Deng,Ruqiang Wu,Ramadan A. Geioushy,Yaxi Li,Yixian Liu,Fengling Zhou,Haitao Li,Chenghua Sun
标识
DOI:10.1007/s11467-021-1067-8
摘要
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 high-efficient electrocatalysts in the field of nitrogen reduction reaction (NRR). In this paper, we developed a BiVO4/TiO2 nanotube (BiVO4/TNT) heterojunction composite with rich oxygen vacancies as an electrocatalytic NRR catalyst. The heterojunction interface and oxygen vacancy of BiVO4/TNT can be the active site of N2 dynamic activation and proton transition. The synergistic effect of TiO2 and BiVO4 shortens the proton transport path and reduces the over potential of chemical reaction. BiVO4/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 Na2SO4 solution.
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