Hydrogen sorption and rehydrogenation properties of NaMgH3

Luis Contreras*, Margarita Mayacela, Alberto Bustillos, Leonardo Rentería, David Book

*Corresponding author for this work

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The formation and hydrogen sorption properties of the NaMgH3 perovskite/type hydride have been examined. Samples were mechanically ball milled under argon for 2, 5 and 15 h; then characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA) coupled with a mass spectrometer (MS). Lattice parameters and cell volume of the main NaMgH3 phase increase as a function of milling. Dehydrogenation proceeded in two-step reactions for the NaMgH3. The maximum amount of released hydrogen was achieved for the 2 h milled NaMgH3 hydride accounting for 5.8 wt.% of H2 from 287 C to 408 C. Decomposed NaMgH3 samples were reversibly hydrogenated under 10 bar H2 at ~200 C.

Original languageEnglish
Article number205
Number of pages12
Issue number2
Publication statusPublished - 22 Jan 2022

Bibliographical note

Funding Information:
Funding: This research was funded by Technical University of Ambato, Research and Development Directorate, Research Project ID PFICM23 “Análisis de la capacidad de generación de Hidrógeno como energía no contaminante mediante fuentes de energía renovables fotovoltaica y eólica”.

Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.


  • Dehydrogenation
  • Hydrogen storage
  • Mechanical milling
  • Perovskite hydrides
  • Rehydrogenation

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys


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