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Title: Effect of MoS{sub 2} on hydrogenation storage properties of LiBH{sub 4}

The hydrogen storage properties of LiBH{sub 4} ball milled with 20 wt% MoS{sub 2} have been investigated. It shows that the LiBH{sub 4} doped with MoS{sub 2} exhibits favorable hydrogenation and dehydrogenation properties in terms of decomposition temperature and hydriding/dehydriding reversibility. The sample with MoS{sub 2} starts to release hydrogen at 230 °C and has a decrease of 80 °C in contrast with pristine LiBH{sub 4}. Furthermore, for the second cycle, the LiBH{sub 4} with MoS{sub 2} maintains a reversible hydrogen storage capacity of about 8.0 wt% which is almost identical with the first cycle under 5 MPa at 550 °C. Analyzed by the XRD and the FTIR results, LiBH{sub 4} can be regenerated after re-hydrogenation under a relatively mild condition by adding MoS{sub 2}. The improvement of the hydrogenation and dehydrogenation properties mainly results from the formation of Li{sub 2}S and MoB{sub 2} during ball milling. -- Graphical abstract: Hydrogen absorption curves of LiBH{sub 4} doped with MoS{sub 2} for five cycles at 400 °C. Highlights: • The hydrogen absorption capacity is nearly the same for 5 cycles at 400 °C. • The sample with MoS{sub 2} starts to release hydrogen at 230 °C. • The coexistence of MoB{submore » 2} and Li{sub 2}S catalyzes the decomposition of LiBH{sub 4}.« less
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [2] ;  [3] ; ;  [1]
  1. College of Environmental and Chemical Engineering, Yanshan University, Qinhuangdao 066004 (China)
  2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004 (China)
  3. (China)
Publication Date:
OSTI Identifier:
22275841
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 211; Journal Issue: Complete; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; CATALYSTS; DECOMPOSITION; DEHYDROGENATION; DOPED MATERIALS; FOURIER TRANSFORMATION; HYDROGEN; HYDROGEN STORAGE; HYDROGENATION; INFRARED SPECTRA; LITHIUM SULFIDES; MOLYBDENUM BORIDES; MOLYBDENUM SULFIDES; X-RAY DIFFRACTION