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

doi:10.2320/matertrans.MA201018

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

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article › peer-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 Ti_xMg_1-3X/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 language	English
Pages (from-to)	635-640
Number of pages	6
Journal	Materials Transactions
Volume	52
Issue number	4
DOIs	https://doi.org/10.2320/matertrans.MA201018
Publication status	Published - 2011 Apr

Keywords

Dehydrogenation reaction
Hydride
Hydrogen
Magnesium borohydride
X-ray absorption fine structure

ASJC Scopus subject areas

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

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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, Hai Wen; Orimo, Shin Ichi.

In: Materials Transactions, Vol. 52, No. 4, 04.2011, p. 635-640.

Research output: Contribution to journal › Article › peer-review

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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.",

keywords = "Dehydrogenation reaction, Hydride, Hydrogen, Magnesium borohydride, X-ray absorption fine structure",

author = "Daiju Matsumura and Takahiro Ohyama and Yuka Okajima and Yasuo Nishihata and Li, {Hai Wen} and Orimo, {Shin Ichi}",

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AU - Matsumura, Daiju

AU - Ohyama, Takahiro

AU - Okajima, Yuka

AU - Nishihata, Yasuo

AU - Li, Hai Wen

AU - Orimo, Shin Ichi

PY - 2011/4

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N2 - 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.

AB - 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.

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KW - Hydride

KW - Hydrogen

KW - Magnesium borohydride

KW - X-ray absorption fine structure

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

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Keywords

ASJC Scopus subject areas

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