期刊
APPLIED SURFACE SCIENCE
卷 427, 期 -, 页码 106-113出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.08.171
关键词
Halloysite nanotubes; Ammonia borane; Bimetallic copper-cobalt; Hydrolytic dehydrogenation; Polyelectrolytes modification
类别
资金
- National Natural Science Foundation of China [21576247, 21403053, U1404503]
In present work, we prepared the bimetallic Cu-Co nanocatalysts on poly (diallyldimethylammonium chloride) functionalized halloysite nanotubes (Cu-Co/PDDA-HNTs) by a deposition-reduction technique at room temperature. The analysis of XRD, SEM, TEM, HAADF-STEM and XPS were employed to systematically investigate the morphology, particle size, structure and surface properties of the nanocomposite. The results reveal that the PDDA coating with thickness of similar to 15 nm could be formed on the surface of HNTs, and the existence of PDDA is beneficial to deposit Cu and Co nanoparticles (NPs) with high dispersibility on the surface. While the cost-effective nanocomposite was used for the hydrolytic dehydrogenation of ammonia-borane (NH3BH3), the nanocatalyst showed extraordinary catalytic properties with high total turnover frequency of 30.8 mol(H2)/(mol(metal) min), low activation energy of 35.15 kJ mol(-1) and high recycling stability (> 90% conversion at 10th reuse). These results indicate that the bimetallic Cu-Co nanocatalysts on PDDA functionalized HNTs have particular potential for application in release hydrogen process. (C) 2017 Elsevier B.V. All rights reserved.
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