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- W2898825876 abstract "In the present work, nanocrystalline Mg2Ni with an average size of 20–50 nm was prepared via ball milling of a 2MgH2Ni powder followed by compression under a pressure of 280 MPa. The phase component, microstructure, and hydrogen sorption properties were characterized by using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), pressure-composition-temperature (PCT) and synchronous thermal analyses (DSC/TG). Compared to the non-compressed 2MgH2Ni powder, the compressed 2MgH2Ni pellet shows lower dehydrogenation temperature (290 °C) and a single-phase Mg2Ni is obtained after hydrogen desorption. PCT measurements show that the nanocrystalline Mg2Ni obtained from dehydrogenated 2MgH2Ni pellet has a single step hydrogen absorption and desorption with fairly low absorption (−57.47 kJ/mol H2) and desorption (61.26 kJ/mol H2) enthalpies. It has very fast hydrogen absorption kinetics at 375 °C with about 3.44 wt% hydrogen absorbed in less than 5 min. The results gathered in this study show that ball milling followed by compression is an efficient method to produce Mg-based ternary hydrides." @default.
- W2898825876 created "2018-11-09" @default.
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- W2898825876 date "2018-12-01" @default.
- W2898825876 modified "2023-10-09" @default.
- W2898825876 title "Hydrogen storage properties of nanocrystalline Mg2Ni prepared from compressed 2MgH2Ni powder" @default.
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- W2898825876 doi "https://doi.org/10.1016/j.ijhydene.2018.10.055" @default.
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