期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 39, 期 13, 页码 6987-6994出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2014.02.122
关键词
Ni3B; Carbon-supported; Ammonia borane; Catalytic hydrolysis; Hydrogen generation
资金
- MOST [2012AA051503, 2010CB631301, 2012AA051901]
- NSFC [51371100, 51101089, 51271094]
- Tianjin Basic and HighTech Development [13SJCZDJC26500, 12JCQNJCO3900]
We report the preparation of Ni3B and carbon-supported Ni3B (denoted as Ni3B/C) nanoparticles, and their catalytic performance for hydrogen generation from hydrolytic dehydrogenation of ammonia borane (NH3BH3, AB). Ni3B and Ni3B/C were prepared via a chemical reduction and crystallization in tetraethylene glycol solution. The obtained Ni3B catalysts are in well-defined crystalline state and Ni3B/C catalysts have a high dispersion in the carbon. The hydrogen generation measurement shows that the carbon-supported Ni3B presents enhanced catalyst activity during hydrolytic dehydrogenation of AB. Among the as-prepared Ni3B/C catalysts, Ni3B/C with 34.25 wt% Ni3B loading displays the best catalytic activity, delivering a high hydrogen release rate of 1168 mL min(-1) g(-1) and the lower activation energy of 46.27 kJ mol(-1). The kinetic results show that the hydrolysis is a first-order reaction in catalyst concentration, while it is a zero-order in AB concentration. Furthermore, the Ni3B/C is a recyclable catalyst under mild reaction conditions, indicating that the carbon-supported Ni3B is a promising catalyst for AB hydrolytic dehydrogenation. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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