Stability investigation of the γ-MgH 2 phase synthesized by high-energy ball milling

Ntumba Lobo, Akito Takasaki, Kentaro Mineo, Alicja Klimkowicz, Kamil Goc

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Structural investigations showed that the crystal structure influences the hydrogen storage properties of MgH 2 . The crystal structure and dehydriding temperature of MgH 2 activated by high energy ball milling under an argon atmosphere were studied. The X-ray diffraction characterization showed that a small amount of tetragonal α-MgH 2 phase transforms into crystalline γ-MgH 2 of an orthorhombic structure during milling, and γ-MgH 2 peak intensity increased with increasing ball milling time within a certain limit, but disappeared early in the hydrogenation cycle at a temperature of 300 °C. We studied the phase structure and the stability of the MgH 2 during absorption/desorption cycles as well as thermal stability in a context of sustainable use of MgH 2 .

Original languageEnglish
JournalInternational Journal of Hydrogen Energy
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • Hydrogen absorption/desorption
  • Mechanical milling
  • Thermal stability
  • XRD
  • γ-MgH

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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