Titanium catalyzed solid-state transformations in LiAlH4 during high-energy ball-milling

被引：187

作者：

Balema, VP

Wiench, JW

Dennis, KW

Pruski, M

Pecharsky, VK

机构：

[1] Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA

[2] Iowa State Univ Sci & Technol, Dept Mat Sci & Engn, Ames, IA 50011 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2001年 / 329卷 / 1-2期

关键词：

lithium aluminum hydrides; mechanochemistry; solid state catalysis;

D O I：

10.1016/S0925-8388(01)01570-5

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：

Mechanical processing of polycrystalline LiAlH4 in the presence of titanium- and iron-based catalysts induces the transformation of LiAlH4 into Li(3)AIH(6), Al and H-2 at room temperature. Several catalysts were tested and it was established that their activity gradually decreases from TiCl4 to Fe in the series TiCl4 > Al3Ti much greater than Al22Fe3Ti8 > Al3Fe > Fe. The high catalytic activity of TiCl4 has been attributed to microcrystalline intermetallic Al3Ti, which rapidly forms in situ from TiCl4 and LiAlH4 during mechanical processing and then acts as a heterogeneous dehydrogenation catalyst. (C) 2001 Elsevier Science BY All rights reserved.

引用

页码：108 / 114

页数：7

共 37 条

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