Open AccessEffect of the chemical vapor deposition condition on the electrochemically catalytic efficiency for hydrogen evolution reaction in MoS2 nanoparticles
Author(s) -
Quyen Le Do,
Duc Anh Nguyen
Publication year - 2021
Publication title -
khoa học công nghệ
Language(s) - English
Resource type - Journals
ISSN - 1859-0128
DOI - 10.32508/stdj.v24i2.2520
Subject(s) - tafel equation , electrocatalyst , x ray photoelectron spectroscopy , chemical vapor deposition , materials science , catalysis , raman spectroscopy , electrode , scanning electron microscope , electrochemistry , nanoparticle , chemical engineering , reversible hydrogen electrode , metalorganic vapour phase epitaxy , nanotechnology , chemistry , working electrode , composite material , organic chemistry , optics , physics , engineering , epitaxy , layer (electronics)
Using the metal organic chemical vapor deposition (MOCVD) method, we have synthesized the MoS2 nanoparticles on graphite foil substrates employed as the electrochemical working electrodes with highly efficient electrocatalysis for hydrogen evolution reaction (HER).
Methods: The morphological and structural properties of the as-grown MoS2 materials were demonstrated by field emission scanning electron microscope (FESEM) and Raman spectroscopies, while their elemental components were investigated by X-ray photoelectron spectroscopy (XPS).
Results: The optimum growth time was acquired to be 11 hours. Thereby such obtained electrode exhibited the maximum HER activity with onset over the potential of 220 mV versus reversible hydrogen electrode (RHE), and the Tafel slope of 66 mV per decade (mV/dec).
Conclusion: Our results suggest a good technique for the research of high-efficient HER electrocatalyst based on atomic-thickness layered materials.