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Published May 25, 2010 | public
Journal Article Metadata-only

Role of Li_2B_(12)H_(12) for the Formation and Decomposition of LiBH_4

Friedrichs, O.
Remhof, A.
Hwang, S.-J. ORCID icon
Züttel, A.

Abstract

By in situ X-ray diffraction (XRD) and nuclear magnetic resonance (NMR) spectroscopy, the role of Li_2B_(12)H_(12) for the sorption of LiBH_4 is analyzed. We demonstrate that Li_2B_(12)H_(12) and an amorphous Li_2B_(10)H_(10) phase are formed by the reaction of LiBH_4 with diborane (B_2H_6) at 200 °C. Based on our present results, we propose that the Li -2B - (12)H_(12) formation in the desorption of LiBH_4 can be explained as a result of reaction of diborane and LiBH_4. This reaction of the borohydride with diborane may also be observed for other borohydrides, where B_(12)H_(12) phases are found during decomposition.

Additional Information

© 2010 American Chemical Society. Received February 22, 2010. Revised Manuscript Received April 2, 2010. Publication Date (Web): April 15, 2010. Financial support from the sixth Framework Program of the European Commission (NESSHY Contract No. 518271), the Swiss National Science Foundation (SNF-Project 200021-119972/1), the Swiss Federal Office of Energy and the integrated project of ICC-IMR is gratefully acknowledged. S.J.H. acknowledges financial support from the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, in the Hydrogen, Fuel Cells & Infrastructure Technologies Program under Contract Nos. DE-AI-01-05EE11105. The NMR facility at Caltech was supported by the National Science Foundation (NSF) under Grant Number 9724240 and partially supported by the MRSEC Program of the NSF under Award Number DMR-0520565.

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August 19, 2023
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October 20, 2023