Study of Mg-M (M = Co, Ni and Fe) mixture elaborated by reactive mechanical alloying: Hydrogen sorption properties

Jean Louis Bobet, Etsuo Akiba, B. Darriet

Research output: Contribution to journalArticlepeer-review

116 Citations (Scopus)

Abstract

Reactive Mechanical Alloying (MA in H2) of magnesium powder allows to obtain partial conversion of Mg to MgH2. The ratio MgH2/Mg can be improved by increasing the milling time or by adding a 3d-element (with the same initial particle size). X-ray diffraction was applied successfully to determine the quantity of MgH2 formed. The RMA allows to suppress the activation procedure generally requested for magnesium. The hydriding is determined to be a two step process: first nucleation and then diffusion. A direct relationship exists between the nucleation duration and the specific surface. It is demonstrated that RMA for short time (2 h) is an effective way to strongly improve the hydrogen storage properties of both magnesium and (Mg + 10 wt% M) mixtures.

Original languageEnglish
Pages (from-to)493-501
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume26
Issue number5
DOIs
Publication statusPublished - May 1 2001

All Science Journal Classification (ASJC) codes

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

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