Fe-Doped BiOCl Nanosheets with Light-Switchable Oxygen Vacancies for Photocatalytic Nitrogen Fixation

Since photocatalytic N2 to NH3 is a kinetically complex and multielectron reaction, designing efficient materials to fix N2 is highly essential. Herein, we reported that simultaneously introducing oxygen vacancy and doping Fe into BiOCl nanosheets (NSs) can greatly boost the photocatalytic N2 fixation. BiOCl NSs-Fe-5% exhibit the maximum NH3 generation rate of 1.022 mmol g–1 h–1 and durable stability after successive cycling, being one of the best photocatalysts for N2 fixation. This work demonstrates a promising strategy to design efficient photocatalysts for N2 fixation, holding great significance for extensions to other material systems.