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Research Article

Morphology-dependent catalytic properties of nanocupric oxides in the Rochow reaction

Yu Zhang1,2, Yongjun Ji1( ), Jing Li1,2, Hezhi Liu1, Xiao Hu3, Ziyi Zhong3, Fabing Su1
State Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China
University of Chinese Academy of SciencesBeijing100049China
Nanyang Environment & Water Research Institute (NEWRI)Nanyang Technological University1 Cleantech LoopCleanTech OneSingapore637141Singapore
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Abstract

Four kinds of CuO catalysts with well-controlled leaf-like (L-CuO), flower-like (F-CuO), sea-urchin-like (U-CuO), and oatmeal-like (O-CuO) morphologies were synthesized by a facile precipitation method assisted by various chelating ligands. High-resolution transmission electron microscopy and fast Fourier transform infrared spectroscopy indicated that the dominant crystal facets of L-CuO, F-CuO, U-CuO, and O-CuO were {001}, {110}, {001}, and {110}, as well as {001} and {110}, respectively. When tested for the Rochow reaction, it was found that their catalytic performances were dependent on their structures. Among the four CuO catalysts, L-CuO exhibited the best catalytic property, along with the strongest adsorption ability for oxygen and highest reducibility, which are mainly because of its largely exposed {001} facet and large specific surface area. In addition, the amount of the Cu3Si alloy phase, which is the most important reaction intermediate that generated in the reacted region of the Si surface, was measured for the different catalysts. Based on the findings, a detailed reaction mechanism was proposed. This work demonstrates that shape-controlled synthesis of oxide catalysts could be an effective strategy to design and develop efficient catalysts.

Keywords

copper oxideshape-controlled synthesisthe Rochow reactionthe Cu3Si alloy phasestructure–property relationship

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Nano Research
Volume 11 Issue 2,
February 2018
Pages 804-819
DOI: 10.1007/s12274-017-1689-x
Cite this article:
Zhang Y, Ji Y, Li J, et al. Morphology-dependent catalytic properties of nanocupric oxides in the Rochow reaction. Nano Research, 2018, 11(2): 804-819. https://doi.org/10.1007/s12274-017-1689-x

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Received: 13 April 2017
Revised: 14 May 2017
Accepted: 17 May 2017
Published: 07 July 2017
© Tsinghua University Press and Springer-Verlag GmbH Germany 2017
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