Pressure-composition isotherms and thermodynamic properties of TiF3-enhanced Na2LiAlH6
The mixed alanate Na2LiAlH6 was prepared by ball-milling and subsequent heat-treatment under H2 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 deg C. A van't Hoff...
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Veröffentlicht in: | Journal of alloys and compounds 2005-07, Vol.397 (1-2), p.135-139 |
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Hauptverfasser: | , , , |
Format: | Artikel |
Sprache: | eng |
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Online-Zugang: | Volltext |
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Zusammenfassung: | The mixed alanate Na2LiAlH6 was prepared by ball-milling and subsequent heat-treatment under H2 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 deg C. A van't Hoff plot was constructed using the equilibrium desorption plateau pressures. From this plot, a dissociation enthalpy of 56.4 plus/minus 0.4 kJ/mol H2 and a corresponding entropy of 137.9 plus/minus 0.7 J/K mol H2 was found for Na2LiAlH6. |
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ISSN: | 0925-8388 1873-4669 |
DOI: | 10.1016/j.jallcom.2005.01.012 |