Pressure-composition isotherms and thermodynamic properties of TiF3-enhanced Na2LiA1H6

被引：34
作者：
Fossdal, A [1 ]
Brinks, HW [1 ]
Fonnelop, JE [1 ]
Hauback, BC [1 ]
机构：
[1] Inst Energy Technol, Dept Phys, NO-2027 Kjeller, Norway
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2005年 / 397卷 / 1-2期
关键词：
hydrogen storage materials; alanates; ball-milling; pressure-composition isotherms; thermodynamic properties;
D O I：
10.1016/j.jallcom.2005.01.012
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：
The mixed alanate Na2LiAlH6 was prepared by ball-milling and subsequent heat-treatment under H-2 pressure. After the synthesis, 2 mol% TiF3 was added by ball-milling. Pressure-composition isotherms were measured for the Ti-enhanced material in the temperature range of 170-250 degrees C. A van't Hoff plot was constructed using the equilibrium desorption plateau pressures. From this plot, a dissociation enthalpy of 56.4 +/- 0.4 kJ/mol H-2 and a corresponding entropy of 137.9 +/- 0.7 J/K mol H-2 was found for Na2LiAlH6. (c) 2005 Elsevier B.V. All rights reserved.
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收藏
页码：135 / 139
页数：5
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