An Efficient Nickel Sulfide@NiO Nanocomposite Catalyst with High Density of Active Sites for the Hydrogen Evolution Reaction in Alkaline Media.
| Autor: | Khokhar SP; Nanomaterials Laboratory Institute of Physics University of Sindh Jamshoro, 76080, Sindh Pakistan., Abbasi MA; Nanomaterials Laboratory Institute of Physics University of Sindh Jamshoro, 76080, Sindh Pakistan., Aftab U; Mehran University of Engineering and Technology, 76080 Jamshoro, Sindh Pakistan., Abro MI; Mehran University of Engineering and Technology, 76080 Jamshoro, Sindh Pakistan., Shah AA; NED University of Engineering Sciences and Technology, Karachi, 75270, Sindh Pakistan., Chandio AD; NED University of Engineering Sciences and Technology, Karachi, 75270, Sindh Pakistan., Bhatti AL; Nanomaterials Laboratory Institute of Physics University of Sindh Jamshoro, 76080, Sindh Pakistan., Tahira A; Department of Science and Technology, Campus Norrkoping, Linkoping University, SE-60174 Norrkoping, Sweden., Ibupoto ZH; Dr. M. A. Kazi Institute of Chemistry University of Sindh Jamshoro, 76080, Sindh Pakistan. |
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| Jazyk: | angličtina |
| Zdroj: | Journal of nanoscience and nanotechnology [J Nanosci Nanotechnol] 2021 Apr 01; Vol. 21 (4), pp. 2520-2528. |
| DOI: | 10.1166/jnn.2021.19094 |
| Abstrakt: | Efficient hydrogen evolution reaction (HER) catalysts based on the earth-abundant materials are highly vital to design practical and environmentally friendly water splitting devices. In this study, we present an optimized strategy for the development of active catalysts for hydrogen evolution reaction HER. The composite catalysts are prepared with the nanosurface of NiO for the deposition of NiS by hydrothermal method. In alkaline electrolyte, the NiS/NiO nanocomposite has shown excellent catalytic HER properties at the low onset potential and small Tafel slope of 72 mVdec -1 . A current density of 10 mA/cm² is achieved by the nanocomposite obtained with 0.4 gram of NiO as nanosurface for the deposition of NiS (sample 4) at the cost of 429 mV versus RHE. The sample 4 carries more active sites that allow it to act as excellent HER catalyst. Based on this study, we conclude that increasing the nickel oxide content into composite sample facilitates the HER process. Additionally, a long term HER stability for 10 hours and good durability is also demonstrated by the sample 4. Our findings reveal that the optimization of nickel oxide content in the preparation of catalyst leads to the excellent HER activity for the design of practical water splitting devices and other related applications. |
| Databáze: | MEDLINE |
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