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

doi:10.2320/matertrans.47.1898

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

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

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Abstract

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; MCl_n + 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 T_d of M(BH₄)_n correlates with the Pauling electronegativity χ_P of M; that is, T_d decreases with increasing value of χ_P. The components of desorbed gas for M = Mg, Sc, Zr and Ti (χ_P ≦ 1.5) are hydrogen only, while that for M = Zn (χ_P = 1.6) contains borane besides hydrogen. The Pauling electronegativity χ_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.

Original language	English
Pages (from-to)	1898-1901
Number of pages	4
Journal	Materials Transactions
Volume	47
Issue number	8
DOIs	https://doi.org/10.2320/matertrans.47.1898
Publication status	Published - Aug 2006
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "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",

abstract = "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.",

author = "Yuko Nakamori and Haiwen Li and Kazutoshi Miwa and Towata, {Shin Ichi} and Orimo, {Shin Ichi}",

year = "2006",

month = aug,

doi = "10.2320/matertrans.47.1898",

language = "English",

volume = "47",

pages = "1898--1901",

journal = "Materials Transactions",

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TY - JOUR

T1 - 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

AU - Nakamori, Yuko

AU - Li, Haiwen

AU - Miwa, Kazutoshi

AU - Towata, Shin Ichi

AU - Orimo, Shin Ichi

PY - 2006/8

Y1 - 2006/8

N2 - 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.

AB - 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.

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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

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