Effects of various catalysts on hydrogen release and uptake characteristics of LiAlH4
Effects of various catalysts on hydrogen release and uptake characteristics of LiAlH4
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DOI：
10.1016/j.ijhydene.2004.12.009
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发表时间：
2005-10
影响因子：
7.2
通讯作者：
M. Resan;M. Hampton;J. K. Lomness;D. Slattery
中科院分区：
文献类型：
--
作者：
M. Resan;M. Hampton;J. K. Lomness;D. Slattery
研究了不同催化剂对LiAlH 4放氢性能的影响。通过球磨将催化剂掺入氧化铝中。所研究的催化剂包括元素钛、TiH 2、TiCl 4、TiCl 3、AlCl 3、FeCl 3、元素铁、元素镍、元素钒和炭黑。通过差示扫描量热法结合压力测量和X射线衍射表征了脱附/再脱附性能。TiCl 3和TiCl 4的加入消除了LiAlH 4的第一步析氢，并显著降低了第二步析氢的温度。掺杂元素铁只引起氢释放量的轻微下降，并没有消除析氢的第一步。球磨在没有催化剂的情况下，发现降低氢的释放温度，而掺杂元素铁没有任何额外的影响上的氢释放的温度的LiAlH 4。
The effects of various catalysts on the hydrogen release characteristics of LiAlH4were studied. The catalysts were incorporated into the alanate by ball milling. The catalysts studied included elemental titanium, TiH2, TiCl4, TiCl3, AlCl3, FeCl3, elemental iron, elemental nickel, elemental vanadium, and carbon black. Dehydriding/rehydriding properties were characterized by using differential scanning calorimetry coupled with pressure measurement and X-ray diffraction. The addition of TiCl3and TiCl4to LiAlH4eliminated the first step of hydrogen evolution and significantly lowered decomposition temperature of the second step. Doping with elemental iron caused only a slight decrease in the amount of hydrogen released and did not eliminate the first step of hydrogen evolution. Ball milling in the absence of the catalyst was found to decrease the release temperature of hydrogen, while doping with elemental iron did not have any additional effect on the temperature of hydrogen release of LiAlH4.