FREE MOS2 NANOSHEETS GROWN ON GRAPHENE BY MICROWAVE-ASSISTED SYNTHESIS AS HIGHLY EFFICIENT CATALYST FOR HYDROGEN EVOLUTION

摘要

The MoS_2/reduced graphene oxide (MoS_2/rGO) hybrid material of rGO supported by MoS_2 on surface are considered as an outstanding properties and low-cost catalyst for hydrogen evolution reaction (HER). In this work, we selected an environmentally friendly, efficient and suitable for mass production approach-the microwave-assisted method to synthesis of the MoS_2 nanosheets/reduced graphene oxide (MoS_2 NSs/rGO) hybrid material. The transmission electron microscopy (TEM) confirmed that the hybrid material reserved the superior original MoS_2 NS structural features perfectly and the MoS_2 NS in the hybrid material distribute evenly on rGO surface. The large-sized and thin rGO in the MoS_2 NS/rGO hybrid exhibits a distinct two-dimensional structure. X-ray photoelectron spectroscopy (XPS) is further integrated with the remarkable reduction degree of rGO and there are strong interaction between MoS_2 NSs and rGO. The electrocatalytic test shows a Tafel slope as small as 71mV/decade. We combine here the unique surface structural properties with the lower oxygen content to build the MoS_2 NSs/rGO hybrid catalyst exhibited excellent HER activity.