Journal of the American Chemical Society
COMMUNICATION
change upon H2 desorption. We have discovered a series of first-row
transition-metal halide catalysts that are capable of releasing 2 equiv of
H2 from 1 in less than 30 min in toluene at 80 °C at modest catalyst
loadings. We have demonstrated that neat liquid 1 can quantitatively
release H2 in the presence of FeCl2 catalyst. Furthermore, we have
shown that the spent fuel 2 can be converted back to the charged fuel
1 in good yield. The disclosed hydrogen storage material could
represent a viable H2 storage option for mobile, portable, and carrier
applications. Current efforts are being directed toward developing a
more cost- and energy-efficient regeneration procedure.
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(24) Campbell, P. G.; Abbey, E. R.; Neier, D.; Grant, D. J.; Dixon,
D. A.; Liu, S.-Y. J. Am. Chem. Soc. 2010, 132, 18048.
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Chem., Int. Ed. 2011, 50, 8157.
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’ ASSOCIATED CONTENT
(28) Luo, W.; Zakharov, L. N.; Liu, S.-Y. J. Am. Chem. Soc. 2011,
133, 13006.
(29) Campbell, P. G.; Zakharov, L. N.; Grant, D. J.; Dixon, D. A.; Liu,
S.-Y. J. Am. Chem. Soc. 2010, 132, 3289.
S
Supporting Information. Experimental procedures, spec-
b
troscopic data, and crystallographic data (CIF). This material is
(30) Matus, M. H.; Liu, S.-Y.; Dixon, D. A. J. Phys. Chem. A 2010,
114, 2644.
’ AUTHOR INFORMATION
(31) Jiang, H.-L.; Singh, S. K.; Yan, J.-M.; Zhang, X.-B.; Xu, Q.
ChemSusChem 2010, 3, 541.
(32) Catalysis without Precious Metals; Bullock, R. M., Ed.; Wiley-
VCH: Weinheim, Germany, 2010.
Corresponding Author
(33) Ramachandran, P. V.; Gagare, P. D. Inorg. Chem. 2007, 46, 7810.
(34) Kalidindi, S. B.; Indirani, M.; Jagirdar, B. R. Inorg. Chem. 2008,
47, 7424.
(35) He, T.; Wang, J.; Wu, G.; Kim, H.; Proffen, T.; Wu, A.; Li, W.;
Liu, T.; Xiong, Z.; Wu, C.; Chu, H.; Guo, J.; Autrey, T.; Zhang, T.; Chen,
P. Chem.—Eur. J. 2010, 16, 12814.
(36) See Table S1 for details. The Lewis acid catalysts AlCl3 and
ZnCl2 were also screened; they were found to give incomplete dehydro-
genation and intractable product mixtures and were not pursued further.
(37) Shaw, W. J.; Linehan, J. C.; Szymczak, N. K.; Heldebrant, D. J.;
Yonker, C.; Camaioni, D. M.; Baker, R. T.; Autrey, T. Angew. Chem., Int.
Ed. 2008, 47, 7493.
’ ACKNOWLEDGMENT
This paper is dedicated to Prof. Daniel G. Nocera. S.-Y.L.
gratefully acknowledges the U.S. Department of Energy (DE-
FG36-08GO18143) for financial support. Funding for the Uni-
versity of Oregon Chemistry Research and Instrumentation
Services was furnished in part by the NSF (CHEÀ0923589).
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