Syntheses and hydrogen desorption properties of metal-borohydrides M(BH4)n (M = Mg, Sc, Zr, Ti, and Zn; n = 2-4) as advanced hydrogen storage materials

Yuko Nakamori, Haiwen Li, Kazutoshi Miwa, Shin Ichi Towata, Shin Ichi Orimo

研究成果: ジャーナルへの寄稿学術誌査読

92 被引用数 (Scopus)

抄録

Metal-borohydrides M(BH4)n (M = Mg, Se, Zr, Ti, and Zn; n = 2-4) were synthesized by mechanical milling process according to the following reaction; MCln + nLiBH4/nNaBH4 → M(BH4)n + nLiCl/nNaCl. Then the thermal desorption properties of M(BH4)n were investigated by gas-chromatography and mass-spectroscopy combined with thermogravimetry. The results indicate that the hydrogen desorption temperature Td of M(BH4)n correlates with the Pauling electronegativity χP of M; that is, Td decreases with increasing value of χP. The components of desorbed gas for M = Mg, Sc, Zr and Ti (χP ≦ 1.5) are hydrogen only, while that for M = Zn (χP = 1.6) contains borane besides hydrogen. The Pauling electronegativity χP of M is an indicator to estimate T d of M(BH4)n as candidates for advanced hydrogen storage materials with high gravimetric hydrogen densities and low desorption temperatures.

本文言語英語
ページ(範囲)1898-1901
ページ数4
ジャーナルMaterials Transactions
47
8
DOI
出版ステータス出版済み - 8月 1 2006
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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