A general bottom-up synthesis of CuO-based trimetallic oxide mesocrystal superstructures for efficient catalytic product
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e Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China School of Light Industry, Beijing Technology and Business University, Beijing 100048, China 3 State Key Laboratory of Advanced Special Steel, Shanghai University, Yanchang Road 149, Zhabei District, Shanghai 200072, China 4 College of Materials Sciences and Engineering, Beijing University of Technology, Beijing 100124, China 5 Department of Chemistry, Tsinghua University, Beijing 100084, China 6 College of Engineering, Guangdong Technion–Israel Institute of Technology (GTIIT), 241 Daxue Road, Shantou 515063, China 7 Department of Chemical Engineering, Technion–Israel Institute of Technology (IIT), Haifa 32 000, Israel 8 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China 9 Institute of Industrial Chemistry and Energy Technology, Shenyang University of Chemical Technology, Shenyang 110142, China 10 Zhongke Langfang Institute of Process Engineering, Fenghua Road No 1, Langfang Economic & Technical Development Zone, Langfang 065001, China § Hezhi Liu and Yongjun Ji contributed equally to this work. 2
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Received: 24 April 2020 / Revised: 7 June 2020 / Accepted: 13 June 2020
ABSTRACT Mesocrystals, the non-classical crystals with highly ordered nanoparticle superstructures, have shown great potential in many applications because of their newly collective properties. However, there is still a lack of a facile and general synthesis strategy to organize and integrate distinct components into complex mesocrystals, and of reported application for them in industrial catalytic reactions. Herein we report a general bottom-up synthesis of CuO-based trimetallic oxide mesocrystals (denoted as CuO-M1Ox-M2Oy, where M1 and M2 = Zn, In, Fe, Ni, Mn, and Co) using a simple precipitation method followed by a hydrothermal treatment and a topotactic transformation via calcination. When these mesocrystals were used as the catalyst to produce trichlorosilane (TCS) via Si hydrochlorination reaction, they exhibited excellent catalytic performance with much increased Si conversion and TCS selectivity. In particular, the TCS yield was increased 19-fold than that of the catalyst-free process. The latter is the current industrial process. The efficiently catalytic property of these mesocrystals is attributed to the formation of well-defined nanoscale heterointerfaces that can effectively facilitate the charge transfer, and the generation of the compressive and tensile strain on CuO near the interfaces among different metal oxides. The synthetic approach developed here could be applicable to fabricate versatile complicated metal oxide mesocrystals as novel catalysts for various industrial chemical reactions.
KEYWORDS CuO-based trimetallic oxide mesocrystal, superstructures, catalytic production of trichlorosilane, synthesis strategy
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