Direct synthesis of Mg2NiH4 from MgH2 and Ni

We showed that the exposure of a pressed mixture of MgH2 and Ni powders to a hydrogen atmosphere at 450 °C leads to the direct formation of Mg2NiH4. No pre-milling was used. The reaction was carried out at a hydrogen pressure exceeding the equilibrium over MgH2 and Mg2NiH4. The pressure invariabilit...

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Published in:Physics of complex systems 2023-09, Vol.4 (3)
Main Authors: Александр Петрович Барабан, Валентин Александрович Дмитриев, Игорь Евгеньевич Габис, Алексей Петрович Войт, Семен Нисонович Клямкин, Илья Викторович Шикин
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Language:English
Subjects:
hydrogen storage materials
intermetallide MgNi2
metal hydrides
solid-state direct synthesis
triple hydride Mg2NiH4
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container_title Physics of complex systems
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creator Александр Петрович Барабан
Валентин Александрович Дмитриев
Игорь Евгеньевич Габис
Алексей Петрович Войт
Семен Нисонович Клямкин
Илья Викторович Шикин
description We showed that the exposure of a pressed mixture of MgH2 and Ni powders to a hydrogen atmosphere at 450 °C leads to the direct formation of Mg2NiH4. No pre-milling was used. The reaction was carried out at a hydrogen pressure exceeding the equilibrium over MgH2 and Mg2NiH4. The pressure invariability during the synthesis evidences the absence of a separate stage of magnesium hydride decomposition and stabilization of the synthesized hydride. The amount of Mg2NiH4 was determined by the XRD and TDS methods. SEM with EDX microanalysis was used to examine the morphology of the reaction products. The influence of the exposure time and the synthesis temperature on the reaction yield was studied.
doi_str_mv 10.33910/2687-153X-2023-4-3-94-102
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subjects hydrogen storage materials
intermetallide MgNi2
metal hydrides
solid-state direct synthesis
triple hydride Mg2NiH4
title Direct synthesis of Mg2NiH4 from MgH2 and Ni
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