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.

引用

页码：135 / 139

页数：5

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