Nanocatalysis MoS 2 /rGO: An Efficient Electrocatalyst for the Hydrogen Evolution Reaction.

In this study, a systematic investigation of MoS 2 nanostructure growth on a SiO 2 substrate was conducted using a two-stage process. Initially, a thin layer of Mo was grown through sputtering, followed by a sulfurization process employing the CVD technique. This two-stage process enables the control of diverse nanostructure formations of both MoS 2 and MoO 3 on SiO 2 substrates, as well as the formation of bulk-like grain structures. Subsequently, the addition of reduced graphene oxide (rGO) was examined, resulting in MoS 2 /rGO(n), where graphene is uniformly deposited on the surface, exposing a higher number of active sites at the edges and consequently enhancing electroactivity in the HER. The influence of the synthesis time on the treated MoS 2 and also MoS 2 /rGO(n) samples is evident in their excellent electrocatalytic performance with a low overpotential.