Probing the reaction pathway of dehydrogenation of the LiNH2+LiH mixture using in situ 1H NMR spectroscopy

Mechanisms for the decomposition and dehydrogenation of Li amide/imide

“…14 The above two-step pathway is supported by recent studies using variable-temperature in situ 1 H NMR spectroscopy. 15 As noted by David et al, 16 there are very close structural similarities between the tetragonal LiNH 2 and the antifluorite Li 2 NH. Through structural refinement from synchrotron x-ray diffraction data, they suggested that the transformation between LiNH 2 and Li 2 NH is a bulk reaction that occurs through non-stoichiometric processes within the cubic Li-N-H structure.…”

The effects of ball milling and molar ratio of LiH on the hydrogen storage properties of nanocrystalline lithium amide and lithium hydride (LiNH2+LiH) system

“…Lithium-nitrogen-based hydrides (lithium amides and imides) are considered to be quite promising hydrogen storage materials that could achieve practical hydrogen storage because of their light weight, reasonably high theoretical hydrogen capacity and lower decomposition temperature than that of MgH 2 [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Kinetic rate-limiting steps in dehydrogenation of Li–N–H and Li–Mg–N–H systems – Effects of elemental Si and Al

“…It is demonstrated that NH 3 can be released from the mixture at a temperature as low as 30 C and rapid reaction between LiH and NH 3 occurs at approximately 150 C. The transition from NH 3 release to H 2 followed by disappearance of NH 3 strengthened the validity of the twostep elementary reaction model, i.e. ammonia mediation [7].…”