Diborane release from LiBH4/Silica-Gel mixtures and the effect of additives

被引：99

作者：

Kostka, J. ^{[1
]}

Lohstroh, W. ^{[1
]}

Fichtner, M. ^{[1
]}

Hahn, H. ^{[1
]}

机构：

[1] Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76021 Karlsruhe, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2007年 / 111卷 / 37期

关键词：

D O I：

10.1021/jp073783k

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：

LiBH4 that has been ball-milled with different additives and subsequently mixed with mesoporous silica-gel has been investigated using thermal desorption spectroscopy and thermogravimetry. Mixtures of LiBH4 and mesoporous silica-gel (composition 50:50 wt %) release hydrogen at similar to 260 degrees C. Samples, where LiBH4 was ball-milled prior to mixing with silica-gel with 5 mol % PdCl2, NiCl2, LaCl3 or TiCl3, have similar decomposition temperatures. Mass spectrometry data of the emitted gas streams show that almost all hydrogen desorption events are accompanied by the evolution of gaseous diborane, B2H6. The relative diborane concentration above 350 degrees C is considerably lowered by LaCl3 and TiCl3, whereas the other additives investigated have little influence on the amount of released diborane.

引用

页码：14026 / 14029

页数：4

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