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采用柠檬酸络合-有机模板剂分解法制备了(LA+CO)/(LA+CO+ZR)原子比为0.5的LA-CO-ZR-O催化剂,并与传统的共沉淀法制备的LA-CO-ZR-O催化剂进行比较.N2物理吸附结果表明,采用模板剂法制备的催化剂样品具有较大的比表面积(96.6~117.6 M2/G)和十分均匀的孔径(3.5~4.3 NM);X射线衍射、X射线光电子能谱和X射线吸收精细结构表征结果一致表明,催化剂中活性组分主要为高分散的CO3O4微晶(粒径为23~33 NM),模板剂法制备的催化剂中所有组分的分散性均优于共沉淀法制备的催化剂.程序升温还原实验结果表明,采用聚乙二醇辛基苯基醚与十六烷基三甲基溴化铵为混合模板剂制备的催化剂中CO3O4更容易被还原.CO-O键的活动度与催化剂催化氧化反应的活性密切相关.
LA-CO-ZR-O catalyst with (LA + CO) / (LA + CO + ZR) atomic ratio of 0.5 was prepared by citric acid complex-organic template decomposition method and compared with the conventional LA -CO-ZR-O catalyst.The results of N2 physical adsorption show that the catalyst prepared by the template method has larger specific surface area (96.6 ~ 117.6 M2 / G) and very uniform pore size (3.5 ~ 4.3 NM) X-ray diffraction, X-ray photoelectron spectroscopy and X-ray absorption fine structure characterization results show that the active component of the catalyst mainly composed of highly dispersed CO3O4 crystallites (particle size of 23 ~ 33 NM), the catalyst prepared by the template method The dispersibility of all the components is better than that prepared by coprecipitation method.The experimental results of temperature-programmed reduction showed that polyethylene glycol octylphenyl ether and cetyltrimethylammonium bromide were prepared as mixed templates CO 3 O 4 is more easily reduced in the catalyst.The activity of CO-O bond is closely related to the activity of catalytic oxidation reaction.