Anchoring Black Phosphorus Quantum Dots on Fe-Doped W O Nanowires for Efficient Photocatalytic Nitrogen Fixation.

Herein, we demonstrate that the surface anchoring of black phosphorus quantum dots (BPQDs) and bulk iron-doping in W O nanowires significantly promotes the photocatalytic activity toward N fixation into NH . More specifically, a NH production rate of up to 187.6 μmol g  h could be achieved, nearly one order of magnitude higher than that of pristine W O (18.9 μmol g  h ). Comprehensive experiments and density-functional theory calculations reveal that Fe-doping could enhance the reducing ability of photo-generated electrons by decreasing the work function and elevating the defect band (d-band) centers. Additionally, the surface BPQDs anchoring could facilitate the N adsorption/activation owing to the increased adsorption energy and advantaged W-P dimer bonding-mode. Therefore, synergizing the surface BPQD anchoring and bulk Fe-doping remarkably enhanced the photocatalytic activity of W O nanowires for NH production.