Electrochemical Hydrogen Evolution over Hydrothermally Synthesized Re-Doped MoS2 Flower-Like Microspheres

Electrochemical Hydrogen Evolution over Hydrothermally Synthesized Re-Doped MoS2 Flower-Like Microspheres

In this research, we report a simple hydrothermal synthesis to prepare rhenium (Re)- doped MoS2 flower-like microspheres and the tuning of their structural, electronic, and electrocatalytic properties by modulating the insertion of Re. The obtained compounds were characterized by X-ray diffraction (...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2019-12, Vol.24 (24), p.4631
Main Authors: Aliaga, Juan, Vera, Pablo, Araya, Juan, Ballesteros, Luis, Urzúa, Julio, Farías, Mario, Paraguay-Delgado, Francisco, Alonso-Núñez, Gabriel, González, Guillermo, Benavente, Eglantina
Format: Article
Language:eng
Subjects:
Atoms & subatomic particles
Basal plane
Chemical composition
Electrochemistry
Heavy metals
Hydrogen
Hydrogen evolution
Image transmission
Mapping
Microspheres
Molybdenum
Molybdenum disulfide
Morphology
Organic chemistry
Photoelectron spectroscopy
Photoelectrons
Rhenium
Scanning electron microscopy
Scanning transmission electron microscopy
Spectrum analysis
Transition metals
Transmission electron microscopy
X ray photoelectron spectroscopy
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Summary:In this research, we report a simple hydrothermal synthesis to prepare rhenium (Re)- doped MoS2 flower-like microspheres and the tuning of their structural, electronic, and electrocatalytic properties by modulating the insertion of Re. The obtained compounds were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). Structural, morphological, and chemical analyses confirmed the synthesis of poorly crystalline Re-doped MoS2 flower-like microspheres composed of few stacked layers. They exhibit enhanced hydrogen evolution reaction (HER) performance with low overpotential of 210 mV at current density of 10 mA/cm2, with a small Tafel slope of 78 mV/dec. The enhanced catalytic HER performance can be ascribed to activation of MoS2 basal planes and by reduction in charge transfer resistance during HER upon doping.
ISSN:1420-3049
1420-3049