Microstructure and hydrogen sorption kinetics of Mg nanopowders with catalyst

Á Révész, D. Fátay, T. Spassov

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21 Citations (Scopus)

Abstract

MgH2 powders were ball-milled with and without catalysts (Nb2O5) under hydrogen in a high-energy mill for 10 h. Morphological, structural and microstructural characterization of the nanocomposites, including particle and crystallite size distribution were carried out before and after hydrogen absorption. In order to study the above-mentioned microstructural parameters imaging and X-ray scattering techniques (high-resolution X-ray diffractometry) have been employed. The effect of the particle and grain size on the hydriding/dehydriding kinetics of ball-milled MgH2 + catalyst powders was analyzed. The grain and particle size reduction enhances substantially the hydriding/dehydriding.

Original languageEnglish
Pages (from-to)725-728
Number of pages4
JournalJournal of Alloys and Compounds
Volume434-435
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - May 31 2007

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Keywords

  • Ball milling
  • Hydrogen sorption kinetics
  • Magnesium
  • Nanocrystalline

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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