Ultrasound-assisted co-precipitation synthesis of mesoporous Co_(3)O_(4)–CeO_(2)composite oxides for highly selective catalytic oxidation of cyclohexane  

作　　者：Shangjun Fu Kuiyi You Zhenpan Chen Taobo Liu Qiong Wang Fangfang Zhao Qiuhong Ai Pingle Liu He’an Luo 

机构地区：[1]School of Chemical Engineering,Xiangtan University,Xiangtan 411105,China [2]National&Local United Engineering Research Center for Chemical Process Simulation and Intensification,Xiangtan University,Xiangtan 411105,China

出　　处：《Frontiers of Chemical Science and Engineering》2022年第8期1211-1223,共13页化学科学与工程前沿（英文版）

基　　金：supported by Key Research and Development Program in Hunan Province(Grant No.2019GK2041);Hunan Provincial Natural Science Foundation of China(Grant No.2019JJ50579);Scientific Research Fund of Hunan Provincial Education Department(Grant Nos.18C0106 and 20B550);the fund of the Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education&Hubei Key Laboratory of Catalysis and Materials Science(Grant No.CHCL21004);National Training Program of Innovation and Entrepreneurship for Undergraduates(Grant No.S202010530022);and Hunan Key Laboratory of Environment Friendly Chemical Process Integrated Technology and Collaborative Innovation Center of New Chemical Technologies for Environmental Benignity and Efficient Resource Utilization.

摘　　要：The one-step highly selective oxidation of cyclohexane into cyclohexanone and cyclohexanol as the essential intermediates of nylon-6 and nylon-66 is considerably challenging.Therefore,an efficient and low-cost catalyst must be urgently developed to improve the efficiency of this process.In this study,a Co_(3)O_(4)–CeO2 composite oxide catalyst was successfully prepared through ultrasound-assisted co-precipitation.This catalyst exhibited a higher selectivity to KA-oil,which was benefited from the synergistic effects between Co^(3+))/Co^(2+))and Ce^(4+)/Ce^(3+)redox pairs,than bulk CeO2 and/or Co_(3)O_(4).Under the optimum reaction conditions,89.6%selectivity to KA-oil with a cyclohexane conversion of 5.8%was achieved over Co_(3)O_(4)–CeO2.Its catalytic performance remained unchanged after five runs.Using the synergistic effects between the redox pairs of different transition metals,this study provides a feasible strategy to design high-performance catalysts for the selective oxidation of alkanes.

关 键 词：Co_(3)O_(4)–CeO_(2)composite oxides CYCLOHEXANONE CYCLOHEXANOL ultrasonic-assisted co-precipitation selective oxidation solvent-free 

分 类 号：O64[理学—物理化学]