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- W2020056948 abstract "The La2Mg16Ni hydrogen storage alloy was modified by mechanical grinding in tetrahydrofuran (THF). The use of THF was very important in determining the phase structure, surface characteristics and hydriding/dehydriding properties of the modified alloy. Such alloys show high activity for hydriding even at relatively low temperatures (between room temperature and 448 K). For the La2Mg16Ni alloy milled in THF for 10 h, a hydrogen content of 4.0 wt.% was obtained at 448 K and 3.0 MPa H2 after the initial exposure to hydrogen within 10 min, and a higher hydrogen content of 4.8 wt.% was obtained under the same conditions after several hydriding/dehydriding cycles. The hydrogen content obtained at room temperature and 3.0 MPa H2 was ∼4.0 wt.%. The dehydriding properties of modified alloys were also improved. XRD analysis indicates that the modified alloy has been amorphized to some extent only after milling in THF for 10 h. Auger electron spectroscopy (AES) was used to determine the surface characteristics of the modified alloys. The effect of milling time (10, 20 and 40 h) was also studied. It is believed that charge transfer occurs to some extent on the surface of the modified alloy and thus results in the formation of electron donor–acceptor (EDA) complexes, which provide active sites for hydrogen sorption and further diffusion to the underlying intermetallic phase." @default.
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- W2020056948 date "2002-06-01" @default.
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- W2020056948 title "Change in structure and hydrogen storage properties of La2Mg16Ni alloy after modification by mechanical grinding in tetrahydrofuran" @default.
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- W2020056948 doi "https://doi.org/10.1016/s0925-8388(01)01969-7" @default.
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