2006年8月
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
MATERIALS TRANSACTIONS
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- 巻
- 47
- 号
- 8
- 開始ページ
- 1898
- 終了ページ
- 1901
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.2320/matertrans.47.1898
- 出版者・発行元
- JAPAN INST METALS
Metal-borchydrides M(BH4)(n) (M = Mg, Sc, Zr, Ti, and Zn; n = 2-4) were synthesized by mechanical milling process according to the following reaction; MCln + nLiBH(4)/nNaBH(4) -> 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 T-d of M(BH4)(n) correlates with the Pauling electronegativity chi(P) of M; that is, T-d decreases with increasing value of chi(P). The components of desorbed gas for M = Mg, Sc, Zr and Ti (chi(P) <= 1.5) are hydrogen only, while that for M = Zn (chi(P) = 1.6) contains borane besides hydrogen. The Pauling electronegativity chi(P) 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.
- リンク情報
- ID情報
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- DOI : 10.2320/matertrans.47.1898
- ISSN : 1345-9678
- eISSN : 1347-5320
- CiNii Articles ID : 10019296708
- Web of Science ID : WOS:000241152800007