Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 693, Issue -, Pages 642-649Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.09.204
Keywords
Boron nitride; Ni catalysts; Nanoparticles; Ammonia borane; Hydrogen generation
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Funding
- National Natural Science Foundation of China [51301057, 51272064, 21603052]
- Natural Science Foundation of Hebei Province [B2015202346]
- Natural Science Foundation of Tianjin City of China [15JCYBJC47100]
- Key Basic Research Program of Hebei Province of China [12965135D]
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We report on Ni nanoparticles supported on boron nitride spheres (BNSP) and sheets (BNSH) as catalysts for hydrogen generation via hydrolysis of ammonia borane (NH3BH3, AB). The Ni/BN catalysts were prepared through a redox replacement reaction. The structure, morphology, and chemical composition of the obtained samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) equipped with energy dispersive X-ray spectroscopy (EDX), and inductively coupled plasma emission spectroscopy (ICP). The characterization results showed that Ni nanoparticles were well dispersed on the BNSP and BNSH supports for the four Ni/BN catalysts prepared (Ni atomic contents of 6.8, 9.0, 9.2, and 12 wt%). The catalytic activity toward the hydrolysis of AB was found to correlate with the loading of the Ni/BN catalysts, which showed great cycle performance. Theoretical calculations revealed that BN sheets significantly influenced the electric character of Ni catalysts and thereby their catalytic properties. (C) 2016 Elsevier B. V. All rights reserved.
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