Effect of Ti-doping on the dehydrogenation kinetic parameters of lithium aluminum hydride

被引：55

作者：

Andreasen, Anders

机构：

[1] Riso Natl Lab, Mat Res Dept, DK-4000 Roskilde, Denmark

[2] Tech Univ Denmark, Dept Chem Engn, Interdisciplinary Res Ctr Catalysis, DK-2800 Lyngby, Denmark

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 419卷 / 1-2期

关键词：

hydrogen storage materials; high energy ball milling; X-ray diffraction; thermal analysis;

D O I：

10.1016/j.jallcom.2005.09.067

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 effect of Ti-doping on the dehydrogenation kinetics of lithium aluminum hydride has been investigated in this paper. For the decomposition of lithium aluminum hydride into trilithium hexahydridoaluminate apparent activation energies of 81 and 89 kJ/mol are found for the un-doped and Ti-doped sample, respectively. For the decomposition of trilithium hexahydridoaluminate into lithium hydride apparent activation energies of 108 and 103 kJ/mol are found. The differences in apparent activation energies between the un-doped and the Ti-doped sample are within experimental uncertainty, suggesting that the effect of Ti-doping on the kinetic parameters of dehydrogenation of lithium aluminum hydride, is mainly a prefactor effect. (c) 2005 Elsevier B.V. All right reserved.

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页码：40 / 44

页数：5

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