Co-CO2B, Ni-Ni3B and Co-Ni-B nanocomposites catalyzed ammonia-borane methanolysis for hydrogen generation

Co-Co(2)B and Ni-Ni(3)B nanocomposites were synthesized by the reduction of Co(2+) and Ni(2+) ions using ammonia-borane in methanol. The Co-Ni-B nanocomposite was synthesized by the co-reduction of Co(2+) and Ni(2+) ions. The catalytic activities of these metal nanocomposites were studied for the de...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2009-01, Vol.11 (5), p.770-775
Main Authors: SURESH BABU KALIDINDI, AMIT ASHOK VERNEKAR, JAGIRDAR, Balaji R
Format: Article
Language:English
Subjects:
Catalysis
Chemistry
Exact sciences and technology
General and physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:Co-Co(2)B and Ni-Ni(3)B nanocomposites were synthesized by the reduction of Co(2+) and Ni(2+) ions using ammonia-borane in methanol. The Co-Ni-B nanocomposite was synthesized by the co-reduction of Co(2+) and Ni(2+) ions. The catalytic activities of these metal nanocomposites were studied for the dehydrogenation of ammonia-borane in methanol. Three moles of H(2) were liberated in 2.5 min and 4.2 min in case of Co-Co(2)B and Ni-Ni(3)B nanocomposites, respectively (catalyst/AB = 0.2). The Co-Ni-B nanocomposite showed greater activity compared to individual metal-metal boride nanocomposites: 3 moles of H(2) were liberated in 1.5 min (catalyst/AB = 0.2). The catalysts were highly recyclable and the activities remained almost unchanged even after several cycles.
ISSN:1463-9076
1463-9084
DOI:10.1039/b814216e