Effect of several metal chlorides on the thermal decomposition behaviour of α-Mg(BH4)2

Elisa Gil Bardají, Nobuko Hanada, Oleg Zabara, Maximilian Fichtner

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Mechanochemical alloying of Mg(BH4)2 with small amounts of metal chlorides (PdCl2, TiCl3, VCl3, MoCl3, RuCl3, CeCl3 and NbCl5) results in the formation of transition metal doped nanocomposites with different hydrogen desorption properties. The thermal decomposition properties of ball-milled as well as doped α-Mg(BH4)2 have been studied. An amorphization reaction of Mg(BH4)2 is induced by ball milling, nevertheless a partial recrystallization of the alpha phase takes place after heating up to 150 °C. The effect of ball milling Mg(BH4)2 with each additive has been investigated in detail by using differential scanning calorimetry, thermogravimetric analysis and X-ray diffraction. The onset temperature of Mg(BH4)2 is lowered by more than 100 °C through the addition of Nb- or Ti chloride. Moreover, a mixed Ti-Nb-nanocomposite was also synthesized and investigated. The onset temperature of hydrogen evolution during decomposition of the mixed Ti-Nb-nanocomposite is considerably lowered by up to 125 °C.

Original languageEnglish
Pages (from-to)12313-12318
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume36
Issue number19
DOIs
Publication statusPublished - 2011 Sep 1

Keywords

  • Additive
  • HP-DSC
  • Hydrogen storage
  • In-situ XRD
  • Magnesium borohydride
  • TG-MS

ASJC Scopus subject areas

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

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