MoSe 2 -WS 2 Nanostructure for an Efficient Hydrogen Generation under White Light LED Irradiation.

In this work, MoSe 2 -WS 2 nanocomposites consisting of WS 2 nanoparticles covered with few MoSe 2 nanosheets were successfully developed via an easy hydrothermal synthesis method. Their nanostructure and photocatalytic hydrogen evolution (PHE) performance are investigated by a series of characterization techniques. The PHE rate of MoSe 2 -WS 2 is evaluated under the white light LED irradiation. Under LED illumination, the highest PHE of MoSe 2 -WS 2 nanocomposite is 1600.2 µmol g -1 h -1 . When compared with pristine WS 2 , the MoSe 2 -WS 2 nanostructures demonstrated improved PHE rate, which is 10-fold higher than that of the pristine one. This work suggests that MoSe 2 -WS 2 could be a promising photocatalyst candidate and might stimulate the further studies of other layered materials for energy conversion and storage.