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- W2988492068 endingPage "109252" @default.
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- W2988492068 abstract "Excessive heat stability, poor kinetics of hydrogen absorption and desorption reaction are viewed as the major setbacks for the Mg-based hydrogen storing materials application. The microstructures of samples Mg25-xYxNi9Cu (x = 0, 1, 3, 5, 7) alloys were observed by XRD, SEM, and TEM. Besides, aiming at studying the characteristics of hydrogenation/dehydrogenation, the Sievert instrument, DSC and TGA were applied in the experiments. Substituting Mg with Y can promote the formation of the second phase YNi3 but does not transform the Mg2Ni major phase. This substitution greatly prompts the amorphization. The increase of Y dosage triggers a mild decrease in the absolute values of ΔH and ΔS and remarkably boosts the improvement of dehydrogenation kinetics. Moreover, the increase in Y amount brings on a decrease in hydrogen absorption capability. The hydrogen desorption activation energy markedly lowers with increasing Y content (the Eade values of as-spun Y0 and Y3 samples are 71.38 and 66.13 kJ/mol, severally, and Ekde values of them are 69.03 and 65.53 kJ/mol, respectively), which brings about the promotion of dehydrogenation kinetics of the experimental samples." @default.
- W2988492068 created "2019-11-22" @default.
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- W2988492068 date "2020-03-01" @default.
- W2988492068 modified "2023-10-17" @default.
- W2988492068 title "Hydrogen storage thermodynamics and dynamics of Mg–Y–Ni–Cu based alloys synthesized by melt spinning" @default.
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- W2988492068 doi "https://doi.org/10.1016/j.jpcs.2019.109252" @default.
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