One-step hydrothermal synthesis and electrocatalytic performance of MoS₂/RGO composites

Abstract

Molybdenum disulfide/reduced graphene(MoS2/RGO) composite catalyst was synthesized by one-step hydrothermal method in order to improve the catalytic activity and stability. X-ray diffractometer, scanning electron microscope, transmission electron microscope and rotating disk electrode were used to characterize the physical and chemical properties of the catalyst. The results show that the molybdenum disulfide compound with graphene has pear-shaped structure with few layers, and the layer spacing increases which is uniformly attached to the thin layer of graphene. The oxygen reduction process of molybdenum disulfide catalyst is mainly carried out in two-electron path, while MoS2/RGO composite catalyst can play a synergistic catalytic role in oxygen reduction process and the average number of electron transfer in the process is 3.58. The current density retention rate of the composite catalyst after 20000 s is up to 89.7%.

Keywords

• hydrothermal method
• mos₂/rgo
• oxygen reduction
• catalytic stability