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, Hai Wen Li, Shin Ichi Orimo

    Research output: Contribution to journalArticlepeer-review

    11 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 2011

    All Science Journal Classification (ASJC) codes

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

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