Using variable temperature in situ 1H NMR spectroscopy on a mixture of LiNH2 + LiH that was mechanically activated using high energy ball milling, the dehydrogenation of the LiNH2 + LiH to Li2NH + H2 was investigated. The analysis indicates NH3 release at a temperature as low as 300C and rapid reaction between NH3 and LiH at ~ 1500C. The transition from NH3 release to H2 appearance accompanied by disappearance of NH3 confirms unambiguously the two-step elementary reaction pathway proposed by other workers.
Revised: April 7, 2011 |
Published: June 15, 2008
Citation
Hu J., J. Kwak, Z. Yang, w. osborn, T. Markmaitree, and L.D. Shaw. 2008.Probing the Reaction Pathway of Dehydrogenation of the LiNH2 + LiH Mixture Using In Situ 1H NMR Spectroscopy.Journal of Power Sources 181, no. 1:116-119.PNNL-SA-59762.