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Pulsed laser deposition of nanostructured molybdenum sulfide films creates specific nonequilibrium growth conditions, which improve the electrocatalytic properties of the films in a hydrogen evolution reaction (HER). The enhanced catalytic performance of the amorphous a-MoS  x  (2 ≤ x ≤ 3) matrix is due to the synergistic effect of the Mo nanoparticles (Mo-NP) formed during the laser ablation of a MoS 2 target. This work looks at the possibility of employing a-MoS  x  /NP-Mo films (4 and 20 nm thickness) to produce hydrogen by photo-stimulated HER using a p-Si cathode. A simple technique of pulsed laser p-Si doping with phosphorus was used to form an n + p-junction. Investigations of the energy band arrangement at the interface between a-MoS  x  /NP-Mo and n + -Si showed that the photo-HER on an a-MoS  x  /NP-Mo//n + p-Si photocathode with a 20 nm thick catalytic film proceeded according to a Z-scheme. The thickness of interfacial SiO  y  (P) nanolayer varied little in photo-HER without interfering with the effective electric current across the interface. The a-MoS  x  /NP-Mo//n + p-Si photocathode showed good long-term durability; its onset potential was 390 mV and photocurrent density was at 0 V was 28.7 mA/cm 2 . The a-MoS  x  /NP-Mo//n + p-Si photocathodes and their laser-based production technique offer a promising pathway toward sustainable solar hydrogen production.

nanomaterials

Pulsed Laser Phosphorus Doping and Nanocomposite Catalysts Deposition in Forming a-MoSx/NP-Mo//n+p-Si Photocathodes for Efficient Solar Hydrogen Production