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NMR Study of LiBH_4 with C_(60)

Shane, David T. and Corey, Robert L. and Rayhel, Laura H. and Wellons, Matthew and Teprovich, Joseph A., Jr. and Zidan, Ragaiy and Hwang, Son-Jong and Bowman, Robert C., Jr. and Conradi, Mark S. (2010) NMR Study of LiBH_4 with C_(60). Journal of Physical Chemistry C, 114 (46). pp. 19862-19866. ISSN 1932-7447. https://resolver.caltech.edu/CaltechAUTHORS:20101208-093013969

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Abstract

LiBH_4 doped with 1.6 mol % well-dispersed C_(60) is studied with solid-state nuclear magnetic resonance (NMR). Variable-temperature hydrogen NMR shows large changes between the data upon first heating and after exposure to 300 °C. After heating, a large fraction on the order of 50% of the hydrogen signal appears in a motionally narrowed peak, similar to a previous report of LiBH_4 in a porous carbon aerogel nanoscaffold. Magic-angle spinning (MAS) NMR of ^(13)C in a ^(13)C-enriched sample finds the C_(60) has reacted already in the as-mixed (unheated) material. Dehydriding and rehydriding result in further ^(13)C spectral changes, with nearly all intensity being found in a broad peak corresponding to aromatic carbons. It thus appears that the previously reported improved dehydriding and rehydriding kinetics of this material at least partially result from in situ formation of a carbon framework. The method may offer a new route to dispersal of hydrides in carbon support structures.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/jp107911u DOIArticle
http://pubs.acs.org/doi/full/10.1021/jp107911uPublisherArticle
ORCID:
AuthorORCID
Hwang, Son-Jong0000-0002-3210-466X
Bowman, Robert C., Jr.0000-0002-2114-1713
Additional Information:© 2010 American Chemical Society. Received: August 20, 2010; Revised Manuscript Received: October 13, 2010. Publication Date (Web): November 3, 2010. We gratefully acknowledge support from the Department of Energy through Basic Energy Sciences Grant DE-FG02-ER46256. The NMR facility at Caltech was supported by the National Science Foundation (NSF) under Grant 9724240 and partially supported by the MRSEC Program of the NSF under Award DMR-520565.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-ER46256
NSFDMR-9724240
NSFDMR-520565
Issue or Number:46
Record Number:CaltechAUTHORS:20101208-093013969
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20101208-093013969
Official Citation:NMR Study of LiBH4 with C60 David T. Shane, Robert L. Corey, Laura H. Rayhel, Matthew Wellons, Joseph A. Teprovich Jr., Ragaiy Zidan, Son-Jong Hwang, Robert C. Bowman Jr., Mark S. Conradi The Journal of Physical Chemistry C 2010 114 (46), 19862-19866
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21237
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:14 Dec 2010 17:08
Last Modified:03 Oct 2019 02:21

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