TY - JOUR
T1 - Synthesis and crystal structure analysis of complex hydride Mg(BH 4)(NH2)
AU - Noritake, Tatsuo
AU - Miwa, Kazutoshi
AU - Aoki, Masakazu
AU - Matsumoto, Mitsuru
AU - Towata, Shin Ichi
AU - Li, Hai Wen
AU - Orimo, Shin Ichi
N1 - Funding Information:
The authors express their heartfelt thanks to Dr. M. Fichtner for Mg(BH 4 ) 2 sample provision. The synchrotron radiation experiments were carried out on BL19B2 of the SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No. 2009A1844). This work was partially supported by the New Energy and Industrial Technology Development Organization (NEDO) , “Development for Hydrogen Production, Transportation and Storage System” Project.
PY - 2013/5/30
Y1 - 2013/5/30
N2 - Complex hydride Mg(BH4)(NH2), which consists of double anion BH4- and NH2-, was synthesized and the crystal structure was analyzed by synchrotron X-ray diffraction. The mixture sample of Mg(BH4)2 + Mg(NH 2)2 prepared by ball milling was reacted and crystallized to Mg(BH4)(NH2) by heating at about 453 K. This crystal phase transforms into amorphous phase above 473 K and subsequently the dehydrogenation begins. The crystal structure of Mg(BH4)(NH 2) was determined from measurement data at 453 K (chemical formula: Mg0.94(BH4)1(NH2)0.88, crystal system: tetragonal, space group: I41 (No.80), Z = 8, lattice constants: a = 5.814(1), c = 20.450(4) Å at 453 K). Mg(BH 4)(NH2) is ionic crystal which the cation (Mg 2+) and the anions (BH4- and NH 2-) are stacking alternately along the c-axis direction. Two BH4- and two NH2- tetrahedrally coordinate around Mg2+ ion.
AB - Complex hydride Mg(BH4)(NH2), which consists of double anion BH4- and NH2-, was synthesized and the crystal structure was analyzed by synchrotron X-ray diffraction. The mixture sample of Mg(BH4)2 + Mg(NH 2)2 prepared by ball milling was reacted and crystallized to Mg(BH4)(NH2) by heating at about 453 K. This crystal phase transforms into amorphous phase above 473 K and subsequently the dehydrogenation begins. The crystal structure of Mg(BH4)(NH 2) was determined from measurement data at 453 K (chemical formula: Mg0.94(BH4)1(NH2)0.88, crystal system: tetragonal, space group: I41 (No.80), Z = 8, lattice constants: a = 5.814(1), c = 20.450(4) Å at 453 K). Mg(BH 4)(NH2) is ionic crystal which the cation (Mg 2+) and the anions (BH4- and NH 2-) are stacking alternately along the c-axis direction. Two BH4- and two NH2- tetrahedrally coordinate around Mg2+ ion.
KW - Complex hydride
KW - Hydrogen storage materials
KW - Synchrotron radiation
KW - X-ray diffraction
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U2 - 10.1016/j.ijhydene.2013.03.072
DO - 10.1016/j.ijhydene.2013.03.072
M3 - Article
AN - SCOPUS:84877700817
SN - 0360-3199
VL - 38
SP - 6730
EP - 6735
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 16
ER -
