Facile synthesis of well-dispersed CeO2–CuOx composite hollow spheres with superior catalytic activity for CO oxidation

Jian Zhang; Ming Gong; Yidan Cao; Chang-An Wang

doi:10.1039/C5RA16410A

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Facile synthesis of well-dispersed CeO₂–CuO_x composite hollow spheres with superior catalytic activity for CO oxidation†

Jian Zhang,^ab Ming Gong,^b Yidan Cao^b and Chang-An Wang*^b

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* Corresponding authors

^a School of Materials Science and Engineering, JingDeZhen Ceramic Institute, China

^b State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, China
E-mail: wangca@mail.tsinghua.edu.cn

Abstract

Well-dispersed CeO₂–CuO_x composite hollow spheres have been successfully synthesized through a facile reflux method using carbon spheres as sacrificial templates. The shells of the hollow spheres, ∼40 nm in thickness, consist of self-assembled 10–15 nm sized nanoparticles. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to study the structural features of the CeO₂–CuO_x composite hollow spheres. X-ray photoelectron spectroscopy (XPS) confirmed that most of the copper element is distributed on the surface of the CeO₂ shell support. The CeO₂–CuO_x composite hollow spheres exhibited enhanced catalytic activity for CO oxidation: complete CO conversion could be obtained at 112 °C. The excellent catalytic activity could be ascribed to the hollow structure, high specific surface area and the strong synergistic interaction between CeO₂ and CuO_x.

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Article information

DOI: https://doi.org/10.1039/C5RA16410A
Article type: Paper
Submitted: 14 Aug 2015
Accepted: 28 Oct 2015
First published: 29 Oct 2015

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RSC Adv., 2015,5, 95133-95139

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Facile synthesis of well-dispersed CeO₂–CuO_x composite hollow spheres with superior catalytic activity for CO oxidation

J. Zhang, M. Gong, Y. Cao and C. Wang, RSC Adv., 2015, 5, 95133 DOI: 10.1039/C5RA16410A

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