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<p>Hydride Mg/MgH<sub>2</sub>–Fe<sub>100–</sub><sub><i>x</i></sub>Ni<sub><i>x</i></sub>O<sub><i>y</i></sub> (<i>x</i> = 0, 25, 50, 75, and 100, <i>y</i> = 0 approximately&#xa0;25) composites were investigated in the hydrogen generation reaction via hydrolysis in MgCl<sub>2</sub> solutions. During a&#xa0;90-minute reaction, the best hydrogen yield was demonstrated by the composites containing Fe, Ni, and Fe<sub>75</sub>Ni<sub>25</sub> additives, with conversion degrees of 87%, 90%, and 91%, respectively. The studied materials were synthesized by reactive ball milling in a&#xa0;hydrogen atmosphere. Adding 10 wt% additive into Mg significantly reduced the duration required for magnesium hydride formation. Depending on the duration of mechanochemical hydrogenation, the hydrogen capacity of the samples ranged from 5.1&#xa0;to 6 wt% H<sub>2</sub>, indicating incomplete conversion of Mg into hydride, that is, the formation of Mg/MgH<sub>2</sub> (or MgH<sub>2–</sub><sub><i>x</i></sub>) composites. All synthesized materials were investigated using scanning electron microscopy and&#xa0;X-ray phase analysis.</p>

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Hydrogenation and hydrolysis properties of Mg/MgH2–Fe100–xNixOy composites

  • 期刊论文

  • 发表日期：

    2026年8月4日

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  • V. V. Berezovets,
  • O. P. Kononiuk,
  • Kh. I. Vlad,
  • I. Yu. Zavaliy

摘要

Hydride Mg/MgH2–Fe100–xNixOy (x = 0, 25, 50, 75, and 100, y = 0 approximately 25) composites were investigated in the hydrogen generation reaction via hydrolysis in MgCl2 solutions. During a 90-minute reaction, the best hydrogen yield was demonstrated by the composites containing Fe, Ni, and Fe75Ni25 additives, with conversion degrees of 87%, 90%, and 91%, respectively. The studied materials were synthesized by reactive ball milling in a hydrogen atmosphere. Adding 10 wt% additive into Mg significantly reduced the duration required for magnesium hydride formation. Depending on the duration of mechanochemical hydrogenation, the hydrogen capacity of the samples ranged from 5.1 to 6 wt% H2, indicating incomplete conversion of Mg into hydride, that is, the formation of Mg/MgH2 (or MgH2–x) composites. All synthesized materials were investigated using scanning electron microscopy and X-ray phase analysis.