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.

氨的规模化生产主要依靠哈伯-博世工艺，会导致能耗高和二氧化碳排放量大的问题。电化学固氮被认为是一种环境友好且可持续的过程，但其效率在很大程度上取决于催化剂的活性和稳定性。因此，在氮还原反应（NRR）领域开发高效的电催化剂势在必行。在本文中，我们开发了一种具有丰富氧空位的 BiVO ₄ /TiO ₂纳米管（BiVO ₄ /TNT）异质结复合材料作为电催化 NRR 催化剂。BiVO ₄ /TNT的异质结界面和氧空位可以成为N ₂的活性位点动态激活和质子跃迁。TiO ₂和BiVO ₄的协同作用缩短了质子传输路径，降低了化学反应的过电位。BiVO ₄ /TNT 具有 8.54 µg·h ^-1 ·cm ^{-2 的}高氨产率和 7.70% 的法拉第效率，在 -0.8 V 中相对于 RHE 在 0.1 M Na ₂ SO ₄溶液中。