Functionalized 2D materials F-MoS2 and F-g-C3N4 with TiO2 as Composite Electrocatalysts for Electrochemical Hydrogen Evolution

Electrochemical hydrogen evolution is an important research field to produce renewable energy. Nanostructured two dimensional (2D) materials such as g-C3N4 and MoS2 are po-tential electrocatalysts for hydrogen evolution reaction (HER). The incorporation of semi-conducting material into 2D material enhances the hydrogen evolution. Here in, we have developed composite of acid functionalized MoS2 and g-C3N4 with TiO2 (F-MoS2/TiO2, F-g-C3N4/TiO2). The F-MoS2/TiO2 composite exhibited excellent electrochemical HER activity with an overpotential of 103 mV Vs RHE at 20 mA/cm2 compared to pristine F-MoS2 of 232 mV, TiO2 of 455 mV Vs RHE. In addition F-g-C3N4/TiO2 showed high overpotential of 322 mV at 5 mA/cm2 than pristine F-g-C3N4 and TiO2 of 433 mV and 448 mV Vs RHE at 2.7 mA/cm2 respectively.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.