New synthesis route for ternary transition metal amides as well as ultrafast amide-hydride hydrogen storage materials

K 2 [Mn(NH 2 ) 4 ] and K 2 [Zn(NH 2 ) 4 ] were successfully synthesized via a mechanochemical method. The mixture of K 2 [Mn(NH 2 ) 4 ] and LiH showed excellent rehydrogenation properties. In fact, after dehydrogenation K 2 [Mn(NH 2 ) 4 ]-8LiH fully rehydrogenates within 60 seconds at ca. 230 °C and...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2016-01, Vol.52 (29), p.51-513
Main Authors: Cao, Hujun, Santoru, Antonio, Pistidda, Claudio, Richter, Theresia M. M, Chaudhary, Anna-Lisa, Gizer, Gökhan, Niewa, Rainer, Chen, Ping, Klassen, Thomas, Dornheim, Martin
Format: Article
Language:English
Subjects:
Alkali metals
Amides
Hydrogen storage materials
Mechanochemistry
Metal hydrides
Strategy
Synthesis
Transition metals
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Summary:K 2 [Mn(NH 2 ) 4 ] and K 2 [Zn(NH 2 ) 4 ] were successfully synthesized via a mechanochemical method. The mixture of K 2 [Mn(NH 2 ) 4 ] and LiH showed excellent rehydrogenation properties. In fact, after dehydrogenation K 2 [Mn(NH 2 ) 4 ]-8LiH fully rehydrogenates within 60 seconds at ca. 230 °C and 5 MPa of H 2 . This is one of the fastest rehydrogenation rates in amide-hydride systems known to date. This work also shows a strategy for the synthesis of transition metal nitrides by decomposition of the mixtures of M[M′(NH 2 ) n ] (where M is an alkali or alkaline earth metal and M′ is a transition metal) and metal hydrides. Ternary transition metal amides were first synthesized by mechanochemical reaction without applying high temperatures, high pressures or long reaction times.
ISSN:1359-7345
1364-548X
DOI:10.1039/c6cc00719h