Improvement effects of TiCL on dehydrogenation of magnesium borohydride Mg(BH4)2

Hai Wen Li; Daiiu Matsumura; Yasuo Nishihata; Etsuo Akiba; Shin Ichi Orimo

doi:10.2320/jinstmet.JC201305

Improvement effects of TiCL on dehydrogenation of magnesium borohydride Mg(BH₄)₂

Hai Wen Li, Daiiu Matsumura, Yasuo Nishihata, Etsuo Akiba, Shin Ichi Orimo

材料科学高等研究所

研究成果: Article › 査読

4 被引用数 (Scopus)

抄録

The dehydrogenation property of Mg(BH₄)₂ as a function of the added TiCl₃ content was systematically investigated from viewpoints of kinetics and thermodynamics. The dehydrogenation temperature decreased when the TiCl₃ content x was increased from 0.02 to 0.20 mol, and the initial dehydrogenation temperature notably decreased to approximately 350 K at x=0.20. The main improvement effects of TiCl₃ on the dehydrogenation properties of Mg(BH₄)₂ changed from kinetic to thermodynamic aspects with the increasing addition content. That is, Mg(BH₄)₂ tended to react with TiCl₃ to produce thermodynamically unstable Ti_xMg_(1-3x/2)(BH ₄)₂ (x=0̃0.67). With relatively high addition content (x≥>0.10), thermodynamic destabilization of Me(BH₄)? becomed more dominant. However, with relatively low addition content (x<0.10). TiB? formed from the dehydrogenation of Ti_xMg( 1 ₃x/ ₂) (BH₄)₂ mainly showed kinetic improvement effect.

本文言語	English
ページ（範囲）	627-630
ページ数	4
ジャーナル	Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
巻	77
号	12
DOI	https://doi.org/10.2320/jinstmet.JC201305
出版ステータス	Published - 2013 12月

ASJC Scopus subject areas

凝縮系物理学
材料力学
金属および合金
材料化学

文献へのアクセス

10.2320/jinstmet.JC201305

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引用スタイル

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title = "Improvement effects of TiCL on dehydrogenation of magnesium borohydride Mg(BH4)2",

abstract = "The dehydrogenation property of Mg(BH4)2 as a function of the added TiCl3 content was systematically investigated from viewpoints of kinetics and thermodynamics. The dehydrogenation temperature decreased when the TiCl3 content x was increased from 0.02 to 0.20 mol, and the initial dehydrogenation temperature notably decreased to approximately 350 K at x=0.20. The main improvement effects of TiCl3 on the dehydrogenation properties of Mg(BH4)2 changed from kinetic to thermodynamic aspects with the increasing addition content. That is, Mg(BH4)2 tended to react with TiCl3 to produce thermodynamically unstable TixMg(1-3x/2)(BH 4)2 (x={\~0}0.67). With relatively high addition content (x≥>0.10), thermodynamic destabilization of Me(BH4)? becomed more dominant. However, with relatively low addition content (x<0.10). TiB? formed from the dehydrogenation of TixMg( 1 3x/ 2) (BH4)2 mainly showed kinetic improvement effect.",

keywords = "Borohydride, Catalytic effect, Hydride, Hydrogen, Hydrogen storage",

author = "Li, {Hai Wen} and Daiiu Matsumura and Yasuo Nishihata and Etsuo Akiba and Orimo, {Shin Ichi}",

year = "2013",

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doi = "10.2320/jinstmet.JC201305",

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AU - Li, Hai Wen

AU - Matsumura, Daiiu

AU - Nishihata, Yasuo

AU - Akiba, Etsuo

AU - Orimo, Shin Ichi

PY - 2013/12

Y1 - 2013/12

N2 - The dehydrogenation property of Mg(BH4)2 as a function of the added TiCl3 content was systematically investigated from viewpoints of kinetics and thermodynamics. The dehydrogenation temperature decreased when the TiCl3 content x was increased from 0.02 to 0.20 mol, and the initial dehydrogenation temperature notably decreased to approximately 350 K at x=0.20. The main improvement effects of TiCl3 on the dehydrogenation properties of Mg(BH4)2 changed from kinetic to thermodynamic aspects with the increasing addition content. That is, Mg(BH4)2 tended to react with TiCl3 to produce thermodynamically unstable TixMg(1-3x/2)(BH 4)2 (x=0̃0.67). With relatively high addition content (x≥>0.10), thermodynamic destabilization of Me(BH4)? becomed more dominant. However, with relatively low addition content (x<0.10). TiB? formed from the dehydrogenation of TixMg( 1 3x/ 2) (BH4)2 mainly showed kinetic improvement effect.

AB - The dehydrogenation property of Mg(BH4)2 as a function of the added TiCl3 content was systematically investigated from viewpoints of kinetics and thermodynamics. The dehydrogenation temperature decreased when the TiCl3 content x was increased from 0.02 to 0.20 mol, and the initial dehydrogenation temperature notably decreased to approximately 350 K at x=0.20. The main improvement effects of TiCl3 on the dehydrogenation properties of Mg(BH4)2 changed from kinetic to thermodynamic aspects with the increasing addition content. That is, Mg(BH4)2 tended to react with TiCl3 to produce thermodynamically unstable TixMg(1-3x/2)(BH 4)2 (x=0̃0.67). With relatively high addition content (x≥>0.10), thermodynamic destabilization of Me(BH4)? becomed more dominant. However, with relatively low addition content (x<0.10). TiB? formed from the dehydrogenation of TixMg( 1 3x/ 2) (BH4)2 mainly showed kinetic improvement effect.

KW - Borohydride

KW - Catalytic effect

KW - Hydride

KW - Hydrogen

KW - Hydrogen storage

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