Correlation between structure of titanium additives and dehydrogenation reaction of magnesium borohydride studied by continuous observation of X-ray absorption spectroscopy

Daiju Matsumura, Takahiro Ohyama, Yuka Okajima, Yasuo Nishihata, Haiwen Li, Shin Ichi Orimo

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Local structure of Ti-based additives in Mg(BH4)2 was studied by X-ray absorption fine structure spectroscopy with conventional and dispersive mode in order to understand the correlation between the structure of the additives and dehydrogenation property of Mg(BH4)2. Simultaneous measurement of the dehydrogenation curve and the X-ray absorption spectroscopy by the dispersive optics revealed that a part of TiCl3 additive is converted to TixMg1-3X/2(BH4) 2 (x = 0∼0.67) just after ball milling mixture and then promptly resolved to TiB2 at 100-150°C with the first dehydrogenation oeak. TiO2 additive is slowly converted to lower oxidation state in wide temperature range around the second dehydrogenation peak at 350°C where the main dehydrogenation reaction of Mg(BH4)2 occurs.

Original languageEnglish
Pages (from-to)635-640
Number of pages6
JournalMaterials Transactions
Volume52
Issue number4
DOIs
Publication statusPublished - Apr 1 2011

Fingerprint

Borohydrides
X ray absorption spectroscopy
borohydrides
Dehydrogenation
dehydrogenation
Titanium
Magnesium
magnesium
absorption spectroscopy
titanium
x rays
X ray absorption fine structure spectroscopy
Ball milling
balls
Optics
fine structure
optics
Oxidation
oxidation
curves

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Correlation between structure of titanium additives and dehydrogenation reaction of magnesium borohydride studied by continuous observation of X-ray absorption spectroscopy. / Matsumura, Daiju; Ohyama, Takahiro; Okajima, Yuka; Nishihata, Yasuo; Li, Haiwen; Orimo, Shin Ichi.

In: Materials Transactions, Vol. 52, No. 4, 01.04.2011, p. 635-640.

Research output: Contribution to journalArticle

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