Template-free synthesis of Cu@Cu2O core-shell microspheres and their application as copper-based catalysts for dimethyldichlorosilane synthesis

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[1] Zhang, Zailei
[2] Che, Hongwei
[3] Wang, Yingli
[4] Gao, Jiajian
[5] Ping, Yuan
[6] Zhong, Ziyi
[7] Su, Fabing
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Wang, Y. (wangyl@mail.ipe.ac.cn) | 1600年 / Elsevier B.V.卷 / 211-212期
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We report the synthesis of Cu@Cu2O core-shell microspheres via a facile template-free solvothermal method. The resulting products were characterized by X-ray diffraction; scanning electron microscopy with energy-dispersive spectroscopy; transmission electron microscopy; temperature-programmed reduction; and thermogravimetric analysis. It is found that; Cu2O microspheres were firstly formed through the reduction of copper acetate by glutamic acid; and then; the reduction started inside the microspheres due to the higher surface energies of inner Cu2O particles; resulting in the formation of Cu@Cu2O core-shell structure. The content of Cu core in the composite microspheres increased with the reaction time and temperature. The as-prepared Cu@Cu2O core-shell microspheres exhibited a better catalytic performance for dimethyldichlorosilane synthesis than pure Cu2O and Cu; and even superior to the physically mixed Cu and Cu2O microspheres possibly because of the synergistic catalytic effect. These Cu@Cu2O core-shell microspheres will have potential application in organosilicon industry as copper-based catalysts. © 2012 Elsevier B.V;
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