Dehydrogenation promotion of LiBH4 center dot NH3 through heating in ammonia or mixing with metal hydrides

Authors

Y H. Guo, Fudan university Shanghai China
D. L. Sun, Fudan University China
Zaiping Guo, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow
W.W Sun, Fudan University
Xuebin Yu, University of WollongongFollow

RIS ID

33350

Publication Details

Guo, Y. H., Yu, X., Sun, D., Liu, H. K., Sun, W. Guo, Z. (2010). Dehydrogenation Promotion of LiBH₄·NH₃ Through Heating in Ammonia or Mixing with Metal Hydrides., The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 114 (29), 12823-12827.

Abstract

Amminelithium borohydride (LiBH₄·NH₃) is one of the most hydrogen-rich inorganic materials, showing potential application for hydrogen storage. In this paper, the dehydrogenation of LiBH₄·NH₃ was promoted significantly through heating in ammonia atmosphere which demonstrated that the coordinate between NH₃ and LiBH₄ is a crucial factor in inducing the hydrogen release for this system. Meanwhile, several metal hydrides LiH, NaH, and CaH₂ were found to be effective in promoting the dehydrogenation of LiBH₄·NH₃. Among the studied additives, the effect of LiH, as an example, was discussed in detail. It was found that the promotion of dehydrogenation through LiH is due to the reaction: 3LiH + 3LiBH₄·NH₃ → Li₄BN₃H₁₀ + 2LiBH₄ + 3H₂, releasing hydrogen from 60 °C.