期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 19, 期 47, 页码 31553-31559出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cp06267b
关键词
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资金
- National Natural Science Foundation of China [21703088, 21776119, 21376113, 21621091]
- Natural Science Fund project in Jiangsu Province [BK20160210]
- Natural Science Fund project of Jiangsu Normal University [15XLR022]
We have reported, for the first time, in situ growth of high-index {hk0} faceted concave Pt nanocubes on multi-walled carbon nanotubes (CNTs) via an electrochemical method in choline chloride-urea (ChCl-U) based deep eutectic solvents (DESs). Mechanistic studies indicate that a urea hydrogen bond donor (HBD) plays a key role in the formation of concave Pt nanocubes, in which the urea HBD preferentially adsorbs onto the {100} faces and blocks the growth of nanocrystals along the < 100 > axis. The as-prepared concave Pt nanocubes are characterized to be enclosed mainly with high-index {710}, {610} and {510} facets. It has been determined that the concave cubic Pt/CNT exhibits higher catalytic activity and stability than the flower-like Pt/CNT and commercial Pt/C catalysts, and this is ascribed to its high density of surface atomic steps and the synergistic effect between the CNT and Pt nanocubes.
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