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Open AccessArticle

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

1
Departamento de Química, Universidad Tecnológica Metropolitana, Las Palmeras 3360, Ñuñoa, Santiago, Chile
2
Centro de Investigaciones Costeras de la Universidad de Atacama (CIC-UDA), Universidad de Atacama, Copayapu 485, Copiapó, Chile
3
Instituto de Ciencias Químicas Aplicadas, Universidad Autónoma de Chile, El Llano Subercaseaux 2801, San Miguel, Chile
4
Departamento de Ciencias Farmacéuticas, Facultad de Ciencias, Universidad Católica del Norte, Casilla 1280, Antofagasta, Chile
5
Centro de Nanociencia y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada C. P. 22860, Mexico
6
Departamento de Física de Materiales, Centro de Investigación Materiales Avanzados S.C., Miguel de Cervantes 120, CP 31136, Chihuahua, Mexico
7
Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Santiago, Chile
*
Authors to whom correspondence should be addressed.
Molecules 2019, 24(24), 4631; https://doi.org/10.3390/molecules24244631
Received: 23 November 2019 / Revised: 15 December 2019 / Accepted: 16 December 2019 / Published: 17 December 2019
(This article belongs to the Special Issue Electrocatalytic Water Splitting)
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. View Full-Text
Keywords: molybdenum disulfide; rhenium doping; hydrothermal synthesis; HER; hydrogen evolution reaction molybdenum disulfide; rhenium doping; hydrothermal synthesis; HER; hydrogen evolution reaction
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MDPI and ACS Style

Aliaga, J.; Vera, P.; Araya, J.; Ballesteros, L.; Urzúa, J.; Farías, M.; Paraguay-Delgado, F.; Alonso-Núñez, G.; González, G.; Benavente, E. Electrochemical Hydrogen Evolution over Hydrothermally Synthesized Re-Doped MoS2 Flower-Like Microspheres. Molecules 2019, 24, 4631.

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