An Amorphous Noble-Metal-Free Electrocatalyst that Enables Nitrogen Fixation under Ambient Conditions.

N fixation by the electrocatalytic nitrogen reduction reaction (NRR) under ambient conditions is regarded as a potential approach to achieve NH production, which still heavily relies on the Haber-Bosch process at the cost of huge energy and massive production of CO . A noble-metal-free Bi V O /CeO hybrid with an amorphous phase (BVC-A) is used as the cathode for electrocatalytic NRR. The amorphous Bi V O contains significant defects, which play a role as active sites. The CeO not only serves as a trigger to induce the amorphous structure, but also establishes band alignment with Bi V O for rapid interfacial charge transfer. Remarkably, BVC-A shows outstanding electrocatalytic NRR performance with high average yield (NH : 23.21 μg h  mg , Faradaic efficiency: 10.16 %) under ambient conditions, which is superior to the Bi V O /CeO hybrid with crystalline phase (BVC-C) counterpart.