Enhanced performance for photocatalytic hydrogen evolution using MoS₂/graphene hybrids

A MoS2/graphene hybrid (MSG) is synthesized by microwave hydrothermal method. Both of the charge transfer resistance and the photocurrent are tuned in graphene modified MoS2 by enhancing photocatalytic nature, where the charge transfer resistance significantly decreases from 36,000 Omega-8.49 Omega and the photocurrent promotes from 0.29 mA cm(-2) to 16.47 mA cm(-2). In this article, the result reveals that the appropriate modification of graphene can reach the maximum yield of hydrogen gas. In addition, the appropriate conditions, such as the concentration of 0.32 M formic acid and the MoS2 photocatalyst with 0.8 wt% graphene (MSG(0.8)) dose of 0.013 g L-1, can complete the outstanding photocatalytic hydrogen evolution, where the hydrogen evolution using MSG(0.8) composite photocatalyst has the maximum yield of 667.2 mmol h(-1) g(-1). (c) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.