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Synergetic Effect of FeTi in Enhancing the Hydrogen-Storage Kinetics of Nanocrystalline MgH 2

Author

Listed:
  • Roman Paramonov

    (Department of Materials Physics, Eötvös University, P.O. Box 32, H-1518 Budapest, Hungary)

  • Tony Spassov

    (Department of Chemistry, University of Sofia “St.Kl.Ohridski”, 1164 Sofia, Bulgaria)

  • Péter Nagy

    (Department of Materials Physics, Eötvös University, P.O. Box 32, H-1518 Budapest, Hungary)

  • Ádám Révész

    (Department of Materials Physics, Eötvös University, P.O. Box 32, H-1518 Budapest, Hungary)

Abstract

High-energy ball milling was applied to produce nanocrystalline MgH 2 -FeTi powder composites. In order to achieve a remarkable synergetic effect between the two materials, the amount of the FeTi catalyst was chosen to be 40 wt.%, 50 wt.% and 60 wt.%. The morphology and microstructure of the as-milled powders were characterized by scanning electron microscopy and X-ray diffraction, respectively. The evaluation of the diffraction profiles by the Convolutional Multiple Whole Profile fitting algorithm provided a detailed microstructural characterization of the coherently scattering α-MgH 2 crystallites. Differential scanning calorimetry experiments revealed two overlapping endotherms corresponding to the dehydrogenation of metastable γ-MgH 2 and stable α-MgH 2 hydrides. Isothermal hydrogen-sorption experiments were carried out in a Sieverts-type apparatus. It was established that the MgH 2 -40 wt.% FeTi powder is capable of absorbing 5.8 wt.% hydrogen, while extraordinary absorption kinetics were observed for the MgH 2 -50 wt.% FeTi alloy, i.e., 3.3 wt.% H 2 is absorbed after 100 s.

Suggested Citation

  • Roman Paramonov & Tony Spassov & Péter Nagy & Ádám Révész, 2024. "Synergetic Effect of FeTi in Enhancing the Hydrogen-Storage Kinetics of Nanocrystalline MgH 2," Energies, MDPI, vol. 17(4), pages 1-17, February.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:4:p:794-:d:1334880
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    References listed on IDEAS

    as
    1. Louis Schlapbach & Andreas Züttel, 2001. "Hydrogen-storage materials for mobile applications," Nature, Nature, vol. 414(6861), pages 353-358, November.
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