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Open AccessArticle

Evaluating the Effect of Varying the Metal Precursor in the Colloidal Synthesis of MoSe2 Nanomaterials and Their Application as Electrodes in the Hydrogen Evolution Reaction

1
Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa
2
Department of Chemistry, University of Limpopo Private Bag x1106, Sovenga 0727, South Africa
3
DST/NRF Centre of Excellence in Strong Materials, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa
4
Microscopy and Microanalysis Unit, University of the Witwatersrand, Private Bag 3, Johannesburg, Wits 2050, South Africa
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(9), 1786; https://doi.org/10.3390/nano10091786
Received: 7 July 2020 / Revised: 18 July 2020 / Accepted: 24 July 2020 / Published: 9 September 2020
(This article belongs to the Special Issue Characterization and Preparation of Electrocatalytic Nanomaterials)
Herein we report on the use of different metal precursors in the synthesis of MoSe2 nanomaterials in order to control their morphology. The use of Mo(CO)6 as the metal precursor resulted in the formation of wrinkled few-layer nanosheets, while the use of H2MoO4 as the metal precursor resulted in the formation of nanoflowers. To investigate the effect of the morphologies on their performance as catalysts in the hydrogen evolution reaction, electrochemical characterization was done using linear sweep voltammetry (LSV), cyclic voltammetry (CV), and electrical impedance spectroscopy (EIS). The MoSe2 nanoflowers were found to have superior electrochemical performance towards the hydrogen evolution reaction with a lower Tafel slope, on-set potential, and overpotential at 10 mA/cm2 compared to the wrinkled few-layer nanosheets. This was found to be due to the higher effective electrochemical surface area of the nanoflowers compared to the nanosheets which suggests a higher number of exposed edge sites in the nanoflowers. View Full-Text
Keywords: molybdenum diselenide; colloidal synthesis; HER molybdenum diselenide; colloidal synthesis; HER
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MDPI and ACS Style

Ndala, Z.; Shumbula, N.; Nkabinde, S.; Kolokoto, T.; Nchoe, O.; Shumbula, P.; Tetana, Z.N.; Linganiso, E.C.; Gqoba, S.S.; Moloto, N. Evaluating the Effect of Varying the Metal Precursor in the Colloidal Synthesis of MoSe2 Nanomaterials and Their Application as Electrodes in the Hydrogen Evolution Reaction. Nanomaterials 2020, 10, 1786.

AMA Style

Ndala Z, Shumbula N, Nkabinde S, Kolokoto T, Nchoe O, Shumbula P, Tetana ZN, Linganiso EC, Gqoba SS, Moloto N. Evaluating the Effect of Varying the Metal Precursor in the Colloidal Synthesis of MoSe2 Nanomaterials and Their Application as Electrodes in the Hydrogen Evolution Reaction. Nanomaterials. 2020; 10(9):1786.

Chicago/Turabian Style

Ndala, Zakhele; Shumbula, Ndivhuwo; Nkabinde, Siyabonga; Kolokoto, Tshwarela; Nchoe, Obakeng; Shumbula, Poslet; Tetana, Zikhona N.; Linganiso, Ella C.; Gqoba, Siziwe S.; Moloto, Nosipho. 2020. "Evaluating the Effect of Varying the Metal Precursor in the Colloidal Synthesis of MoSe2 Nanomaterials and Their Application as Electrodes in the Hydrogen Evolution Reaction" Nanomaterials 10, no. 9: 1786.

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