Dual MOF-Derived MoS 2 /CdS Photocatalysts with Rich Sulfur Vacancies for Efficient Hydrogen Evolution Reaction.

Cocatalyst plays an important role in efficient charge transfer and separation for photocatalysis. Herein, a MoS 2 /CdS photocatalyst with MoS 2 as cocatalyst was designed by using Mo-MOF and Cd-MOF as precursors. Due to the existence of rich sulfur vacancies and 1T phase, MoS 2 shows strong charge capture and transport ability. The photo-generated electrons on conduction band (CB) can be bound by the sulfur vacancy of CdS and effectively transported to MoS 2 through the compact interface between the CdS nanoparticles and 2D large-scale MoS 2 . The optimal photocatalyst 1 %MoS 2 /CdS exhibited dramatically improved photocatalytic hydrogen production activity, which is 28 times that of pristine CdS and even about 2 times that of 1 %Pt/CdS with same loading amount of noble metal Pt. This work highlights the role of Mo-MOF derived MoS 2 with 1T-2H phases as a sustainable and prospective candidate of cocatalyst for improving charge separation and photocatalytic stability of MoS 2 /CdS composites.