Confinement Effect of Carbon Nanotubes: Copper Nanoparticles Filled Carbon Nanotubes for Hydrogenation of Methyl Acetate
Confinement Effect of Carbon Nanotubes: Copper Nanoparticles Filled Carbon Nanotubes for Hydrogenation of Methyl Acetate
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DOI：
10.1021/cs300234e
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发表时间：
2012-08
期刊：
影响因子：
12.9
通讯作者：
Dingneng Wang;Guohui Yang;Qingxiang Ma;Mingbo Wu;Yisheng Tan;Y. Yoneyama;N. Tsubaki
中科院分区：
文献类型：
--
作者：
Dingneng Wang;Guohui Yang;Qingxiang Ma;Mingbo Wu;Yisheng Tan;Y. Yoneyama;N. Tsubaki
Copper nanoparticles filled carbon nanotubes (CNTs) with varied tube diameters were prepared via a convenient sonication-assisted impregnation approach. CNTs and Cu nanoparticles filled CNTs were thoroughly investigated using transmission electron microscopy, Raman spectroscopy, N2 adsorption, X-ray diffraction, and H2 temperature programmed reduction. Confinement effects of CNTs, originated from its diameter and microstructure, on the filled Cu nanoparticles were discovered. For CNTs with smaller tube diameter, a consequential strong autoreduction for the confined Cu nanoparticles was observed, which showed a downward trend with the increasing anneal temperature. Methyl acetate (MeOAc) hydrogenation forming methanol and ethanol was chosen as model reaction to further explore the influence of CNTs confinement effects on the catalytic performance. In the case of catalysts derived from CNTs with smaller inner diameter (4–10 nm), their catalytic performance were improved after the CNTs heat treatment under A...
