Zinc oxide functionalized molybdenum disulfide heterostructures as efficient electrocatalysts for hydrogen evolution reaction |
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| Affiliation: | 1. Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;2. King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia;1. Osmaniye Korkut Ata University, Engineering Faculty, Energy Systems Engineering Faculty, Osmaniye, Turkey;2. Osmaniye Korkut Ata University, Applied Science School of Kadirli, Food Technology, Osmaniye, Turkey;1. Nano-Information Technology Academy (NITA), Dongguk University, Seoul, South Korea;2. Department of Physics and Nanotechnology, SRM University, Kattankulathur, India;3. Center of Research Excellence in Corrosion, King Fahd University of Petroleum & Minerals, Saudi Arabia;4. Quantum-Functional Semiconductor Research Center (QSRC), Dongguk University, Seoul, South Korea;1. Dr. M.A Kazi Institute of Chemistry University of Sindh Jamshoro, 76080, Sindh, Pakistan;2. Institute of Plant Sciences, University of Sindh, 76080, Pakistan |
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| Abstract: | Technology urges to replace the state-of-the-art catalysts such as platinum with low cost, earth abundant and durable electrocatalysts for efficient hydrogen evolution (HER) reaction which is going to become the major sustainable production of energy in future. Herein, we present the heterostructure based MoS2.ZnO (MZO) heterostructures for successful electrochemical water splitting process. For HER, the prepared MoS2.ZnO nanocomposites show the over potential as low as 239 mV at cathodic current density 10 mAcm?2 with an exchange current density of 3.2 μAcm?2. A Tafel slope of about 62 mV per decade suggested to have the Volmer-Heyrovsky mechanism for the HER process with MoS2.ZnO nanocomposite as the catalyst. The small Tafel slope indicates a promising electrocatalyst for HER in practical application. The strong interface formation at the MoS2.ZnO heterostructure facilitates higher catalytic activity and excellent cycling stability. The heterostructure formation based on semiconductor two dimensional (2D) transition metal dichalcogenides (TMDC) open up new avenues for effective manipulation of HER catalysts. |
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| Keywords: | 2D heterostructure Electrocatalysis Water splitting Hydrogen evolution reaction (HER) |
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