A NaAlH4-Ca(BH4)2 composite system for hydrogen storage

被引：15
作者：
Moller, Kasper T. [1 ,2 ]
Grinderslev, Jakob B. [1 ,2 ]
Jensen, Torben R. [1 ,2 ]
机构：
[1] Univ Aarhus, Interdisciplinary Nanosci Ctr iNANO, DK-8000 Aarhus, Denmark
[2] Univ Aarhus, Dept Chem, DK-8000 Aarhus, Denmark
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 720卷
基金：
新加坡国家研究基金会;
关键词：
Hydrogen storage; Reactive hydride composites; Sodium alanate; Calcium alanate; X-RAY-DIFFRACTION; CRYSTAL-STRUCTURES; HYDRIDES; DECOMPOSITION; BOROHYDRIDE; ALANATE; MOBILE;
D O I：
10.1016/j.jallcom.2017.05.264
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：
Mechanochemical treatment (ball-milling) of NaAlH4-Ca(BH4)2 mixtures leads to partial formation of NaBH4 and Ca(AlH4)(2) by a metathesis reaction. The reaction proceeds to different extents depending on the applied ball-milling times, which is confirmed by powder X-ray diffraction and infrared spectroscopy. Additionally, an in-situ synchrotron radiation powder X-ray diffraction study reveals that the metathesis reaction continues due to thermal treatment while the data also supports a two-step decomposition of the formed Ca(AlH4)(2). Finally, the reactive hydride composite system was investigated by mass spectrometry and Sieverts' measurement, which reveal release of similar to 6 wt% H-2 at T < 400 degrees C. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：497 / 501
页数：5
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