Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 43, Issue 11, Pages 5541-5550Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2018.01.129
Keywords
Hydrogen energy; Nanowires; Ammonia borane; Heterogeneous catalysis
Categories
Funding
- National Natural Science Foundation of China [51661008]
- Natural Science Foundation of Guangdong Province [2016A030313120]
- Excellent Youth Foundation of the University in Guangdong Province [YQ2015154]
- Natural Science Foundation of Huizhou University [20160226013501332]
- China Ukraine Technology Park Platform Project [2014C050012001]
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In this work, we have prepared a series of CuxNi1-xCo2O4(x = 0,0.2, 0.4, 0.5, 0.6, 0.8, and 1) nanowires with a diameter of approximately 30 nm, which were characterized by X-ray powder diffractometry, scanning and transmission electron microscopy, and X-ray photoelectron spectrometry. For the first time, the catalytic activity of these CuxNi1-xCo2O4 nanowires in ammonia borane (AB) hydrolysis was investigated, and it was found that a significant synergistic effect exists between NiCo2O4 and CuCo2O4 in the hydrolytic reaction. Among these CuxNi1-xCo2O4 samples, the Cu0.6Ni0.4Co2O4 nanowires showed the highest turnover frequency (TOF) of 119.5 mol(hydrogen) min(-1) mole(cat)(-1). This value is 1.66 times as high as that for CoP nanoparticles, which is the most active noble-metal-free catalyst towards AB hydrolysis ever reported in the literature. Because of the low cost and high catalytic performance, the Cu0.6Ni0.4Co2O4 nanowires can be a robust catalyst towards AB hydrolysis in practical applications. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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