Electrochemical Hydrogen Evolution Reaction Triggered by Co2xMo1-xS2 (x = 0. 0.05 and 0.1) in Acidic Medium

Aruna K Kunhiraman,Bradha Madhavan

doi:10.5185/amlett.2021.081655

Abstract

Facile solvothermal route was adopted for the synthesis of Co2xMo1-xS2 with x = 0, 0.05 and 0.1. Higher HER activity was exhibited by x = 0.1 in Co doped MoS2, with a current density -140 mAcm -2 at an overpotential of -100 mV. At lower overpotential both the compositions exhibited almost same activity, whereas with the increase in the overpotential and under continuous electrochemical operation, the active sites of composition with x = 0.1 was triggered and it was reflected in its HER activity.

Highlights

Incremental population and rising standards of living result in increase in the demand of energy
The electrocatalytic performance of the materials were analyzed from voltammetric plots, which were obtained using an M/S BioLogic Science electrochemical work station (VSP multichannel model) using a conventional three-electrode cell with glassy carbon electrode (GCE) as working electrode (W.E), mercury mercurous sulfate (MMS) as reference electrode and pure graphite rod as counter electrode respectively
The reduction in the crystallinity with the increase in the concentration of Co in MoS2 structure is well clear by the presence of broad and low diffraction peaks

Summary

Introduction

Incremental population and rising standards of living result in increase in the demand of energy. Efficient cathode catalysts for hydrogen evolution reaction (HER) are the key to achieve optimal performance in water splitting. Creating more number of active sites at the edges will enhance the HER activity of the catalyst.

Results

Conclusion