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 amide-hydride 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.
Insights into the Rb-Mg-N-H System: An Ordered Mixed Amide/Imide Phase and a Disordered Amide/Hydride Solid Solution / Santoru, Antonio; Pistidda, Claudio; Brighi, Matteo; Chierotti, Michele R.; Heere, Michael; Karimi, Fahim; Cao, Hujun; Capurso, Giovanni; Chaudhary, Anna-Lisa; Gizer, Gökhan; Garroni, Sebastiano; Sørby, Magnus H.; Hauback, Bjørn C.; Černý, Radovan; Klassen, Thomas; Dornheim, Martin. - In: INORGANIC CHEMISTRY. - ISSN 0020-1669. - 57:6(2018), pp. 3197-3205. [10.1021/acs.inorgchem.7b03232]
Insights into the Rb-Mg-N-H System: An Ordered Mixed Amide/Imide Phase and a Disordered Amide/Hydride Solid Solution
Santoru, Antonio
;Garroni, Sebastiano;
2018-01-01
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 amide-hydride 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
