Ammonia borane at high pressures

作者：Chen Jiuhua^*; Drozd Vadym; Sun Yongzhou; Najiba Shah

来源：Chinese Science Bulletin, 2014, 59(36): 5227-5234.

DOI：10.1007/s11434-014-0619-5

• Ammonia borane
• High pressure
• Raman spectroscopy
• X-ray diffraction
• Phase transition

Ammonia borane has received tremendous research attention in the past decade because of its potential for chemical hydrogen storage. This paper reviews recent studies about the behavior of ammonia borane at high pressures. While much work is still needed to comprehensively understand the pressure influence on this molecular crystal, a phase diagram based on the available experimental and theoretical data is constructed. Raman spectroscopy studies indicate five transitions upon compression up to 65 GPa at ambient temperature. Diffraction experiments and theoretical studies demonstrate that three of these transitions are first-order phase transformations in the sequence of I4mm-Cmc2(1)-P2(1)-(different) P2(1), and two are iso-structural. A low-temperature phase (Pmn2(1)) and a high-temperature high-pressure phase (Pmna) are also recognized.

• 出版日期2014-12
• 单位吉林大学