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Near Ambient Condition Hydrogen Storage in a Synergized Tricomponent Hydride System
Author(s) -
Wang Han,
Wu Guotao,
Cao Hujun,
Pistidda Claudio,
Chaudhary AnnaLisa,
Garroni Sebastiano,
Dornheim Martin,
Chen Ping
Publication year - 2017
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201602456
Subject(s) - dehydrogenation , hydrogen storage , hydride , materials science , reagent , enthalpy , desorption , hydrogen , kinetic energy , chemical engineering , standard enthalpy change of formation , inorganic chemistry , thermodynamics , chemistry , catalysis , organic chemistry , metallurgy , alloy , adsorption , metal , physics , quantum mechanics , engineering
Reversible hydrogen storage over hydrides of light elements (HLEs) under ambient condition has been pursued actively for nearly two decades. However, because of unfavorable thermodynamics and/or severe kinetic barrier of HLEs, limited progress has been made. Here, it is demonstrated that the interaction of LiBH 4 with Mg(NH 2 ) 2 and LiH, three of the most investigated HLEs, can lead to a fully reversible dehydrogenation/rehydrogenation cycle at temperatures below 373 K. More importantly, with the desorption enthalpy of 24 kJ (mol H 2 ) −1 the dehydrogenation process at 1.0 bar H 2 is theoretically possible to be as low as 266 K. Characterization of this combination of HLEs shows that LiBH 4 serves as a reagent complexing with intermediates and products of the dehydrogenation of Mg(NH 2 ) 2 ‐LiH, and significantly alters the overall thermodynamic and kinetic properties of the system.