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      CoS 2/TiO 2 Nanocomposites for Hydrogen Production under UV Irradiation

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          Abstract

          Transition metal chalcogenides have intensively focused on photocatalytic hydrogen production for a decade due to their stronger edge and the quantum confinement effect. This work mainly focuses on synthesis and hydrogen production efficiencies of cobalt disulfide (CoS 2)-embedded TiO 2 nanocomposites. Materials are synthesized by using a hydrothermal approach and the hydrogen production efficiencies of pristine CoS 2, TiO 2 nanoparticles and CoS 2/TiO 2 nanocomposites are compared under UV irradiation. A higher amount of hydrogen production (2.55 mmol g −1) is obtained with 10 wt.% CoS 2/TiO 2 nanocomposite than pristineTiO 2 nanoparticles, whereas no hydrogen production was observed with pristine CoS 2 nanoparticles. This result unveils that the metal dichalcogenide–CoS 2 acts as an effective co-catalyst and nanocrystalline TiO 2 serves as an active site by effectively separating the photogenerated electron–hole pair. This study lays down a new approach for developing transition metal dichalcogenide materials with significant bandgaps that can effectively harness solar energy for hydrogen production.

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          Hydrogen-Evolution Catalysts Based on Non-Noble Metal Nickel-Molybdenum Nitride Nanosheets

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            Amorphous molybdenum sulfide films as catalysts for electrochemical hydrogen production in water

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              Molybdenum boride and carbide catalyze hydrogen evolution in both acidic and basic solutions.

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                Author and article information

                Journal
                Materials (Basel)
                Materials (Basel)
                materials
                Materials
                MDPI
                1996-1944
                24 November 2019
                December 2019
                : 12
                : 23
                : 3882
                Affiliations
                [1 ]Faculty of Engineering and Science, Western Norway University of Applied Sciences, 5020 Bergen, Norway; sivagowrishanmugaratnam@ 123456gmail.com
                [2 ]Clean Energy Research Laboratory, Department of Physics, University of Jaffna, Jaffna 40000, Sri Lanka; pravirajan@ 123456gmail.com
                [3 ]Department of Natural Science, University of Agder, 4630 Kristiansand, Norway; alfred.christy@ 123456uia.no
                [4 ]Department of Chemistry, University of Jaffna, Jaffna 40000, Sri Lanka
                Author notes
                Author information
                https://orcid.org/0000-0002-4162-7446
                https://orcid.org/0000-0002-9593-1806
                https://orcid.org/0000-0003-3920-1478
                Article
                materials-12-03882
                10.3390/ma12233882
                6926893
                31771298
                da6a4e9d-9848-485c-9459-f0c4c4c88169
                © 2019 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 22 October 2019
                : 22 November 2019
                Categories
                Article

                transition metal chalcogenides,titania,hydrothermal,hydrogen,water splitting

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