Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 33, Issue 24, Pages 7385-7391Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2008.09.055
Keywords
Cobalt boride; Catalyst; Hydrogen generation; Sodium borohydride; Hydrolysis
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Funding
- National Hi-tech projects 863 of China [2006AA5Z120, 2007AA0SZ144]
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Co-B catalysts were prepared by the chemical reduction of COCl2 with NaBH4 for hydrogen generation from borohydride hydrolysis. The catalytic properties of the Co-B catalysts were found to be sensitive to the preparation conditions including pH of the NaBH4 Solution and mixing manner of the precursors. A Co-B catalyst with a very high catalytic activity was obtained through the formation of a colloidal Co(OH)(2) intermediate. The ultra-fine particle size of 10 nm accounted for its super activity for hydrogen generation with a maximum rate of 26 L min(-1) g(-1) at 30 degrees C. The catalyst also changed the hydrolysis kinetics from zero-order to first-order. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
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