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Solvation and Stabilization of Superior Alanate Nanostructures
Author(s) -
Pratthana Chulaluck,
Aguey-Zinsou Kondo-Francois
Publication year - 2022
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202200819
Subject(s) - solvation , hydrogen storage , electronegativity , hydrogen , nanostructure , solvation shell , materials science , ionic bonding , chemistry , inorganic chemistry , solvent , ion , nanotechnology , chemical physics , organic chemistry
NaAlH 4 and LiAlH 4 are promising materials for hydrogen storage due to their high hydrogen density (7.4 and 10.5 mass%, respectively). However, their practical application is hampered from the slow hydrogen kinetics and poor reversibility. To improve the hydrogen properties of alanates, the alternative core–shell strategy has been proposed. In this respect, a simple solvent evaporation method is presented to synthesize the alanate core. In this approach, NaAlH 4 and LiAlH 4 are stabilized by solvation and electrostatic forces, respectively, through the addition of ionic salts. Remarkably, it is found that the size of the alanate nanoparticles can be tuned by varying the concentration of the introduced ion. More importantly, the partial substitution of Na + and Li + with cations of higher electronegativity enables the release of hydrogen at much lower temperatures.