Abstract—
To optimize hydriding conditions for magnesium, a promising material for hydrogen storage systems, we have studied reaction of high-purity hydrogen at a pressure from 30 to 35 atm with a mechanical mixture of magnesium powder and the Mg2Ni intermetallic compound (10–50 wt %), both 200 μm in particle size, at temperatures from 300 to 390°C, without high-energy preactivation of the mixture. The results demonstrate that, on the addition of 20 wt % Mg2Ni, the degree of magnesium hydriding at a temperature of 370–380°C is 95–96%. Experimental evidence is presented that, at temperatures from 220 to 450°C, such a mixture used as a working material in rechargeable high-temperature metal hydride hydrogen accumulators releases more than 6.5 wt % high-purity hydrogen suitable for use in small-scale and laboratory works.
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ACKNOWLEDGMENTS
In this work, we used equipment at the Shared Analytical Facilities Center, Institute of Problems of Chemical Physics, Russian Academy of Sciences.
Funding
This work was supported by the Russian Federation Ministry of Science and Higher Education, state research target, state registration no. AAAA-A19-119061890019-5.
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Fokin, V.N., Fursikov, P.V., Fokina, E.E. et al. Hydriding of Magnesium in the Presence of the Mg2Ni Intermetallic Compound. Inorg Mater 58, 1123–1129 (2022). https://doi.org/10.1134/S0020168522110036
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DOI: https://doi.org/10.1134/S0020168522110036