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Exploring Ternary and Quaternary Mixtures in the LiBH 4 ‐NaBH 4 ‐KBH 4 ‐Mg(BH 4 ) 2 ‐Ca(BH 4 ) 2 System
Author(s) -
Dematteis Erika M.,
Pistidda Claudio,
Dornheim Martin,
Baricco Marcello
Publication year - 2019
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201801130
Subject(s) - bimetallic strip , eutectic system , ternary operation , chemistry , solid solution , thermal decomposition , hydrogen storage , crystallography , hydrogen , thermal analysis , decomposition , inorganic chemistry , thermodynamics , thermal , catalysis , organic chemistry , microstructure , computer science , programming language , physics
Abstract Binary combinations of borohydrides have been extensivly investigated evidencing the formation of eutectics, bimetallic compounds or solid solutions. In this paper, the investigation has been extended to ternary and quaternary systems in the LiBH 4 ‐NaBH 4 ‐KBH 4 ‐Mg(BH 4 ) 2 ‐Ca(BH 4 ) 2 system. Possible interactions among borohydrides in equimolar composition has been explored by mechanochemical treatment. The obtained phases were analysed by X‐ray diffraction and the thermal behaviour of the mixtures were analysed by HP‐DSC and DTA, defining temperature of transitions and decomposition reactions. The release of hydrogen was detected by MS, showing the role of the presence of solid solutions and multi‐cation compounds on the hydrogen desorption reactions. The presence of LiBH 4 generally promotes the release of H 2 at about 200 °C, while KCa(BH 4 ) 3 promotes the release in a single‐step reaction at higher temperatures.