A liquid-based eutectic system: LiBH4·NH 3-nNH3BH3 with high dehydrogenation capacity at moderate temperature

Handle URI:
http://hdl.handle.net/10754/561668
Title:
A liquid-based eutectic system: LiBH4·NH 3-nNH3BH3 with high dehydrogenation capacity at moderate temperature
Authors:
Tan, Yingbin; Guo, Yanhui; Li, Shaofeng; Sun, Weiwei; Zhu, Yihan; Li, Qi; Yu, Xuebin
Abstract:
A novel eutectic hydrogen storage system, LiBH4·NH 3-nNH3BH3, which exists in a liquid state at room temperature, was synthesized through a simple mixing of LiBH 4·NH3 and NH3BH3 (AB). In the temperature range of 90-110 °C, the eutectic system showed significantly improved dehydrogenation properties compared to the neat AB and LiBH 4·NH3 alone. For example, in the case of the LiBH4·NH3/AB with a mole ratio of 1:3, over 8 wt.% hydrogen could be released at 90 °C within 4 h, while only 5 wt.% hydrogen released from the neat AB at the same conditions. Through a series of experiments it has been demonstrated that the hydrogen release of the new system is resulted from an interaction of AB and the NH3 group in the LiBH4·NH3, in which LiBH4 works as a carrier of ammonia and plays a crucial role in promoting the interaction between the NH3 group and AB. The enhanced dehydrogenation of LiBH 4·NH3/AB may result from the polar liquid state reaction environments and the initially promoted formation of the diammoniate of diborane, which will facilitate the B-H⋯H-N interaction between LiBH4·NH3 and AB. Kinetics analysis revealed that the rate-controlling steps of the dehydrogenation process are three-dimensional diffusion of hydrogen at temperatures ranging from 90 to 110 °C. This journal is © The Royal Society of Chemistry.
KAUST Department:
Advanced Membranes and Porous Materials Research Center
Publisher:
Royal Society of Chemistry (RSC)
Journal:
Journal of Materials Chemistry
Issue Date:
2011
DOI:
10.1039/c1jm11158b
Type:
Article
ISSN:
09599428
Sponsors:
This work was partially supported by the Ministry of Science and Technology of China (2010CB631302), the National Natural Science Foundation of China (grant no. 51071047), the Program for New Century Excellent Talents in Universities (NCET-08-0135), the PhD Programs Foundation of Ministry of Education of China (20090071110053), and a Foundation for the Author of National Excellent Doctoral Dissertation of PR China (200746).
Appears in Collections:
Articles; Advanced Membranes and Porous Materials Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorTan, Yingbinen
dc.contributor.authorGuo, Yanhuien
dc.contributor.authorLi, Shaofengen
dc.contributor.authorSun, Weiweien
dc.contributor.authorZhu, Yihanen
dc.contributor.authorLi, Qien
dc.contributor.authorYu, Xuebinen
dc.date.accessioned2015-08-03T09:01:54Zen
dc.date.available2015-08-03T09:01:54Zen
dc.date.issued2011en
dc.identifier.issn09599428en
dc.identifier.doi10.1039/c1jm11158ben
dc.identifier.urihttp://hdl.handle.net/10754/561668en
dc.description.abstractA novel eutectic hydrogen storage system, LiBH4·NH 3-nNH3BH3, which exists in a liquid state at room temperature, was synthesized through a simple mixing of LiBH 4·NH3 and NH3BH3 (AB). In the temperature range of 90-110 °C, the eutectic system showed significantly improved dehydrogenation properties compared to the neat AB and LiBH 4·NH3 alone. For example, in the case of the LiBH4·NH3/AB with a mole ratio of 1:3, over 8 wt.% hydrogen could be released at 90 °C within 4 h, while only 5 wt.% hydrogen released from the neat AB at the same conditions. Through a series of experiments it has been demonstrated that the hydrogen release of the new system is resulted from an interaction of AB and the NH3 group in the LiBH4·NH3, in which LiBH4 works as a carrier of ammonia and plays a crucial role in promoting the interaction between the NH3 group and AB. The enhanced dehydrogenation of LiBH 4·NH3/AB may result from the polar liquid state reaction environments and the initially promoted formation of the diammoniate of diborane, which will facilitate the B-H⋯H-N interaction between LiBH4·NH3 and AB. Kinetics analysis revealed that the rate-controlling steps of the dehydrogenation process are three-dimensional diffusion of hydrogen at temperatures ranging from 90 to 110 °C. This journal is © The Royal Society of Chemistry.en
dc.description.sponsorshipThis work was partially supported by the Ministry of Science and Technology of China (2010CB631302), the National Natural Science Foundation of China (grant no. 51071047), the Program for New Century Excellent Talents in Universities (NCET-08-0135), the PhD Programs Foundation of Ministry of Education of China (20090071110053), and a Foundation for the Author of National Excellent Doctoral Dissertation of PR China (200746).en
dc.publisherRoyal Society of Chemistry (RSC)en
dc.titleA liquid-based eutectic system: LiBH4·NH 3-nNH3BH3 with high dehydrogenation capacity at moderate temperatureen
dc.typeArticleen
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Centeren
dc.identifier.journalJournal of Materials Chemistryen
dc.contributor.institutionShanghai Key Laboratory of Modern Metallurgy and Materials Processing, Shanghai University, Shanghai 200072, Chinaen
dc.contributor.institutionDepartment of Materials Science, Fudan University, Shanghai 200433, Chinaen
kaust.authorZhu, Yihanen
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