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- W1963769440 abstract "Mg–20 wt% Ni–Y composite was successfully prepared by reactive mechanical alloying (RMA). X-ray diffraction (XRD) measurement showed that both MgH 2 and Mg 2 NiH 4 co-exist in the milled composite. The composite exhibits excellent hydrogen sorption kinetics and does not need activation on the first hydrogen storage process. It can absorb 3.92 and 5.59 wt% hydrogen under 3.0 MPa hydrogen pressure at 293 and 473 K in 10 min, respectively, and desorb 4.67wt% hydrogen at 523 K in 30 min under 0.02 MPa hydrogen pressure. The equilibrium desorption pressure of the composite are 0.142, 0.051 and 0.025 MPa at 573, 543 and 523 K, respectively. The differential scanning calorimetry (DSC) measurement showed that dehydrogenation of Mg–20 wt% Ni–Y composite was depressed about 100 K comparing to that of milled pure MgH 2 . It is deduced that both the catalysis effect of Mg 2 Ni and YH 3 distributed in Mg substrate and the crystal defects formed by RMA are the main reason for improving hydrogen sorption kinetics of the Mg–20 wt% Ni–Y composite." @default.
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- W1963769440 date "2007-08-01" @default.
- W1963769440 modified "2023-10-03" @default.
- W1963769440 title "Characterization of Mg–20wt% Ni–Y hydrogen storage composite prepared by reactive mechanical alloying" @default.
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- W1963769440 doi "https://doi.org/10.1016/j.ijhydene.2006.09.022" @default.
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