Journal
JOURNAL OF POWER SOURCES
Volume 195, Issue 24, Pages 8209-8214Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2010.07.079
Keywords
Cobalt clusters; Hydrolysis; Ammonia borane; Hydrogen generation
Funding
- NEDO
- AIST
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Cobalt clusters-silica nanospheres (15-30 nm) were synthesized using a Co(NH3)(6)Cl-3 template method in a polyoxyethylene-nonylphenyl ether/cyclohexane reversed micelle system followed by in situ reduction in aqueous NaBH4/NH3BH3 solutions. The cobalt clusters are located either inside or on the outer surface of the silica nanospheres as shown by the transmission electron microscope (TEM)/energy dispersive X-ray (EDX) and X-ray photoelectron spectroscopy (XPS) measurements. The cobalt-silica nanospheres have a high catalytic activity for the hydrolysis of ammonia borane that generates a stoichiometric amount of hydrogen, and can be efficiently cycled and reused 10 times without any significant loss of the catalytic activity. (C) 2010 Elsevier B.V. All rights reserved.
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