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Effect of Magnesium Fluoride on Hydrogenation Properties of Magnesium Hydride

Author

Listed:
  • Pragya Jain

    (Hydrogen Energy Centre, Department of Physics, Banaras Hindu University, Varanasi 221 005, India
    Hydrogen Research Institute, Université du Québec à Trois-Rivières, Trois-Rivières, QC G9A 5H7, Canada)

  • Viney Dixit

    (Hydrogen Energy Centre, Department of Physics, Banaras Hindu University, Varanasi 221 005, India)

  • Ankur Jain

    (Institute for Advanced Materials Research, Hiroshima University, Higashi-Hiroshima 739-8530, Japan)

  • Onkar N. Srivastava

    (Hydrogen Energy Centre, Department of Physics, Banaras Hindu University, Varanasi 221 005, India)

  • Jacques Huot

    (Hydrogen Research Institute, Université du Québec à Trois-Rivières, Trois-Rivières, QC G9A 5H7, Canada)

Abstract

A cost effective catalyst is of great importance for consideration of MgH2 as potential hydrogen storage material. In this regard, we investigated the catalytic role of alkaline metal fluoride on the hydrogen storage behavior of MgH2. Samples were synthesized by admixing 5 mol % MgF2 into MgH2 powder using planetary ball mill. Hydrogenation measurements made at 335 °C showed that in comparison to only 70% absorption by pure MgH2, catalyzed material absorbed 92% of theoretical capacity in less than 20 min and desorbed completely in almost the same time. Sorption studies done at lower temperatures revealed that complete absorption at temperature as low as 145 °C is possible. This is due to uniform distribution of MgF2 nano particles within the MgH2 powder. X-ray diffraction patterns also showed the presence of stable MgF2 phase that does not decompose upon hydrogen absorption-desorption. Cyclic measurements done at 310 °C showed negligible loss in the overall storage capacity with cycling. These results reveal that the presence of the chemically inert and stable MgF2 phase is responsible for good reversible characteristic and improved kinetics.

Suggested Citation

  • Pragya Jain & Viney Dixit & Ankur Jain & Onkar N. Srivastava & Jacques Huot, 2015. "Effect of Magnesium Fluoride on Hydrogenation Properties of Magnesium Hydride," Energies, MDPI, vol. 8(11), pages 1-11, November.
    • Handle: RePEc:gam:jeners:v:8:y:2015:i:11:p:12330-12556:d:58251
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    Citations

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    Cited by:

    1. Craig M. Jensen & Etsuo Akiba & Hai-Wen Li, 2016. "Hydrides: Fundamentals and Applications," Energies, MDPI, vol. 9(4), pages 1-2, April.
    2. Julián Puszkiel & José M. Bellosta von Colbe & Julian Jepsen & Sergey V. Mitrokhin & Elshad Movlaev & Victor Verbetsky & Thomas Klassen, 2020. "Designing an AB 2 -Type Alloy (TiZr-CrMnMo) for the Hybrid Hydrogen Storage Concept," Energies, MDPI, vol. 13(11), pages 1-26, June.
    3. Anti Kur & Jo Darkwa & John Calautit & Rabah Boukhanouf & Mark Worall, 2023. "Solid–Gas Thermochemical Energy Storage Materials and Reactors for Low to High-Temperature Applications: A Concise Review," Energies, MDPI, vol. 16(2), pages 1-35, January.

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