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Title

Insights into the Rb–Mg–N–H System: an Ordered Mixed Amide/Imide Phase and a Disordered Amide/Hydride Solid Solution

Authors
Santoru, Antonio
Pistidda, Claudio
Chierotti, Michele R.
Heere, Michael
Karimi, Fahim
Cao, Hujun
Capurso, Giovanni
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Published in Inorganic Chemistry. 2018, vol. 57, no. 6, p. 3197-3205
Abstract The crystal structure of a mixed amide-imide phase, RbMgND2ND, has been solved in the orthorhombic space group Pnma (a = 9.55256(31), b = 3.70772(11) and c = 10.08308(32) Å). A new metal amidehydride solid solution, Rb(NH2)xH(1−x), has been isolated and characterized in the entire compositional range. The profound analogies, as well as the subtle differences, with the crystal chemistry of KMgND2ND and K(NH2)xH1−x are thoroughly discussed. This approach suggests that the comparable performances obtained using K- and Rb-based additives for the Mg(NH2)2-2LiH and 2LiNH2− MgH2 hydrogen storage systems are likely to depend on the structural similarities of possible reaction products and intermediates.
Keywords Hydrogen storageAmidePowder diffraction
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Structures
Research group Groupe Cerny
Project FP7: ECOSTORE
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SANTORU, Antonio et al. Insights into the Rb–Mg–N–H System: an Ordered Mixed Amide/Imide Phase and a Disordered Amide/Hydride Solid Solution. In: Inorganic Chemistry, 2018, vol. 57, n° 6, p. 3197-3205. https://archive-ouverte.unige.ch/unige:104964

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Deposited on : 2018-06-05

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