Effects of catalysts on the dehydriding of alanates monitored by proton NMR

被引：22
|
作者：
Majer, G
Stanik, E
Banuet, LEV
Grinberg, F
Kircher, O
Fichtner, M
机构：
[1] Max Planck Inst Met Res, D-70569 Stuttgart, Germany
[2] Karlsruhe Res Ctr, Inst Nanotechnol, D-76021 Karlsruhe, Germany
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2005年 / 404卷
关键词：
complex hydrides; hydrogen storage; hydrogen dynamics; nuclear magnetic resonance (NMR);
D O I：
10.1016/j.jallcom.2004.11.105
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：
In situ studies of the transition from NaAlH4 to Na3AlH6 are performed by proton NMR for samples doped with TiCl3 and with Ti-13-nanoclusters. The local hydrogen dynamics in the different compounds is studied by the nuclear spin-lattice relaxation. For the Ti-doped NaAlH4 samples a double-exponential recovery of the nuclear magnetization is observed, indicating two fractions of hydrogen with different mobilities. In Na3AlH6 a transition from hindered rotation of the AlH6 groups to full isotropic reorientation of these groups is observed in the temperature range 200-260 K. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：738 / 742
页数：5
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