Copper-cobalt Bimetallic Oxides-doped Alumina Hollow Spheres: a Highly Efficient Catalyst for Epoxidation of Styrene

doi:10.1007/s40242-018-8158-2

Chemical Research in Chinese Universities ›› 2019, Vol. 35 ›› Issue (1): 125-132.doi: 10.1007/s40242-018-8158-2

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Copper-cobalt Bimetallic Oxides-doped Alumina Hollow Spheres: a Highly Efficient Catalyst for Epoxidation of Styrene

LI Baitao, HUANG Jing, WANG Xiujun

Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China

Received:2018-05-14 Revised:2018-06-11 Online:2019-02-01 Published:2018-06-26
Contact: LI Baitao, WANG Xiujun E-mail:btli@scut.edu.cn;xjwangcn@scut.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(No.21673079), the Guangdong Science and Technology Planning Project, China(No.2015A020216002), the Guangdong Natural Science Foundation, China(No.2016A030313518) and the Guangzhou Science and Technology Program, China(No.201804010116).

Abstract

Abstract: Copper-cobalt bimetallic oxides-doped alumina hollow spheres (CuCo/AHS) were fabricated through the sacrificial carbonaceous template strategy. The dependence of the physicochemical properties and morphologies of CuCo/AHS on the composition of copper and cobalt in Cu_xCo_y/AHS (x/y=9/1, 7/3, 5/5, and 3/7) was characterized by means of X-ray powder diffraction, nitrogen physisorption, atomic adsorption spectroscopy, scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. Among these catalysts, Cu₇Co₃/AHS catalyst exhibited perfect hollow sphere structure, thin wall, and big pore size. The calcined catalysts were examined for the epoxidation of styrene with tert-butyl hydroperoxide as oxidant. Compared with the monometallic counterparts (Cu/AHS and Co/AHS) and other Cu_xCo_y/AHS catalysts, Cu₇Co₃/AHS catalyst showed higher performance, yielding a styrene conversion of 64.6% with 93.0% selectivity toward styrene oxide. In addition, the strong interaction of Cu²⁺ or Co²⁺ with AHS ensured good stability after four consecutive reactions.

Key words: Alumina hollow sphere, Styrene epoxidation, Cu-Co bimetallic catalyst, Styrene oxide

LI Baitao, HUANG Jing, WANG Xiujun. Copper-cobalt Bimetallic Oxides-doped Alumina Hollow Spheres: a Highly Efficient Catalyst for Epoxidation of Styrene[J]. Chemical Research in Chinese Universities, 2019, 35(1): 125-132.

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Copper-cobalt Bimetallic Oxides-doped Alumina Hollow Spheres: a Highly Efficient Catalyst for Epoxidation of Styrene

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