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Pressure-induced structural changes in Methylamine borane and dimethylamine borane
被引:3
|作者:
Szilagyi, Petra A.
[1
]
Hunter, Steven
[2
,3
,4
]
Morrison, Carole A.
[2
,3
]
Tang, Chiu C.
[5
]
Pulham, Colin R.
[2
,3
,4
]
机构:
[1] Univ Greenwich, Medway Campus, Chatham ME4 4TB, Kent, England
[2] Univ Edinburgh, Sch Chem, Kings Bldg,West Mains Rd, Edinburgh EH9 3JJ, Midlothian, Scotland
[3] Univ Edinburgh, EaStCHEM Res Sch, Kings Bldg,West Mains Rd, Edinburgh EH9 3JJ, Midlothian, Scotland
[4] Univ Edinburgh, Ctr Sci, Extreme Condit, Mayfield Rd, Edinburgh EH9 3JZ, Midlothian, Scotland
[5] Diamond Light Source Ltd, Harwell Sci & Innovat Campus, Didcot OX11 0DE, Oxon, England
基金:
英国工程与自然科学研究理事会;
关键词:
Hydrogen storage;
Phase transition;
High pressure;
Synchrotron X-ray powder diffraction;
HYDROGEN-STORAGE MATERIALS;
X-RAY-DIFFRACTION;
AMMONIA-BORANE;
MAGNESIUM BOROHYDRIDE;
CATALYTIC DEHYDROCOUPLING/DEHYDROGENATION;
THERMAL-DECOMPOSITION;
CRYSTAL-STRUCTURE;
DEHYDROGENATION;
METAL;
RAMAN;
D O I:
10.1016/j.jallcom.2017.06.174
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Methylamine borane and dimethylamine borane have been studied under compression to 3 GPa using Raman spectroscopy and synchrotron powder X-ray diffraction. Both undergo reversible pressure-induced structural changes in this pressure range. The structural changes in the case of methylamine borane may be indicative of a second-order phase transition, taking place between ca. 0.8-1.2 GPa, which does not result in a change of space-group symmetry. In the case of dimethylamine borane, however, a reversible, reconstructive phase transition (monoclinic -> orthorhombic) occurs below 0.7 GPa. This new high-pressure phase was successfully indexed, with a possible space group assignment of Pccn or Pbcn. (C) 2017 Elsevier B.V. All rights reserved.
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页码:953 / 961
页数:9
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