Premium
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.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom