Abstract
The key to synthesis highly efficient MoS_2 based electrocatalyst for hydrogen evolution reaction (HER) is to construct a reasonable composite system structure to improve the stability, reduce the aggregation and improve the intrinsic poor conductivity. In this paper, M0S_2 composite of erbium-based metal-organic framework (noted as Er-MOF/MoS_2) were synthesized by hydrothermal method. The morphology and structure of the synthesized samples were characterized by powder X-ray diffraction (XRD), field emission electron microscopy (FESEM), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS), and the electrocatalytic performances were tested by linear sweep voltammograms (LSV), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), i-t. On the basis of the experiment, Er-MOF/M0S_2 shows improved conductivity and more exposed active sites, exhibiting excellent HER activity in acidic media, with only 234 mV overpotential to achieve 10 mA cm~(-2), and a Tafel slope of 54.3 mV dec~(-1). This strategy of porous structure of MoS_2 composite rare earth metal organic framework materials provides a novel and effective solution for preparing high performance MoS_2 based electrocatalyst.
NSTL
Elsevier