Physiochemical pathway for cyclic dehydrogenation and rehydrogenation of LiAlH4

Journal of the American Chemical Society
Jun WangJames A Ritter

Abstract

A five-step physiochemical pathway for the cyclic dehydrogenation and rehydrogenation of LiAlH4 from Li3AlH6, LiH, and Al was developed. The LiAlH4 produced by this physiochemical route exhibited excellent dehydrogenation kinetics in the 80-100 degrees C range, providing about 4 wt % hydrogen. The decomposed LiAlH4 was also fully rehydrogenated through the physiochemical pathway using tetrahydrofuran (THF). The enthalpy change associated with the formation of a LiAlH4.4THF adduct in THF played the essential role in fostering this rehydrogenation from the Li3AlH6, LiH, and Al dehydrogenation products. The kinetics of rehydrogenation was also significantly improved by adding Ti as a catalyst and by mechanochemical treatment, with the decomposition products readily converting into LiAlH4 at ambient temperature and pressures of 4.5-97.5 bar.

References

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Citations

Mar 24, 2007·Journal of Molecular Modeling·Wojciech Grochala
Aug 26, 2011·Journal of the American Chemical Society·Xiangfeng LiuCraig M Jensen
Mar 20, 2009·Journal of the American Chemical Society·Xiangfeng LiuCraig M Jensen
Mar 16, 2007·Physical Chemistry Chemical Physics : PCCP·Sudhakar V AlapatiDavid S Sholl
Jul 3, 2015·Chemical Communications : Chem Comm·Huanjun XuZhimin Liu
Apr 4, 2018·Physical Chemistry Chemical Physics : PCCP·Weijin ZhangPing Chen
Jun 3, 2015·ChemSusChem·Qiwen LaiKondo-Francois Aguey-Zinsou
Mar 11, 2010·Advanced Materials·Chang LiuHui-Ming Cheng
Aug 22, 2013·Chemical Communications : Chem Comm·Andrew F DalebrookGábor Laurenczy
Nov 29, 2017·Physical Chemistry Chemical Physics : PCCP·Hujun CaoMartin Dornheim
Sep 13, 2007·Chemical Reviews·Shin-Ichi OrimoCraig M Jensen

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