逆уCeO2/CuχCo1–χOδ催化剂的制备及其CO催化氧化性能  

Preparation of inverseуCeO2/CuχCo1-χOδcatalysts and their catalytic activities for CO oxidation

作　　者：谷荣彩 叶丽萍 杨丙星 黄金花 张建勇 邓维 GU Rongcai;YE Liping;YANG Bingxing;HUANG Jinhua;ZHANG Jianyong;DENG Wei(School of Chemical and Environmental Engineering,Shanghai Institute of Technology,Shanghai 201418,China;State Key Laboratory of Polyolefins and Catalysts,Shanghai 200062,China;Shanghai Research Institute of Chemical Industry Co.,Ltd.,Shanghai 200062,China;Shanghai Key Laboratory of Catalyst Technology for Polyolefins,Shanghai 200062,China)

机构地区：[1]上海应用技术大学化学与环境工程学院,上海201418 [2]聚烯烃催化技术与高性能材料国家重点实验室,上海200062 [3]上海化工研究院有限公司,上海200062 [4]上海聚烯烃催化技术重点实验室,上海200062

出　　处：《精细化工》2020年第3期540-546,共7页Fine Chemicals

基　　金：2018上海市人才发展资金资助项目(2018019)。

摘　　要：以Cu(NO3)2·3H2O、Co(NO3)2·6H2O、Ce(NO3)3·6H2O和(NH4)2CO3为原料,采用共沉淀法-浸渍法结合的制备方式,制得逆负载型уCe O2/CuχCo1–χOδ催化剂(у=0、5%、15%、25%;χ=0~1.0;δ=1.0~1.4)。通过XRD、BET、H2-TPR、XPS考察了Cu O和Co3O4质量比[m(Cu O)∶m(Co3O4)]、表面Ce O2负载量(у)(以CuχCo1–χOδ质量为基准,下同)对逆负载уCe O2/CuχCo1–χOδ催化剂催化氧化CO性能的影响。结果表明,15%Ce O2/Cu0.2Co0.8Oδ[m(Cu O)∶m(Co3O4)=0.2∶0.8]催化剂催化性能最佳。常压下,当反应温度为75℃时,CO转化率可达100%。由于15%Ce O2/Cu0.2Co0.8Oδ比表面积较大,两相界面较多,进而使得CeO2与Cu-O-Co固溶体相互作用较强,表面存在较多的氧空穴、Cu^+和Co^3+,催化剂还原温度较低,催化活性较好。A series of inverseуCeO2/CuχCo1-χOδcatalysts(у=0,5%,15%,25%;χ=0~1.0;δ=1.0~1.4)were prepared by combinations of co-precipitation method and impregnation method using Cu(NO3)2·3 H2O,Co(NO3)2·6 H2O,Ce(NO3)3·6 H2O and(NH4)2CO3 as raw materials.The influences of the mass ratio of CuO to Co3 O4 and CeO2 loading(y)(based on the mass of CuχCo1-χOδ)on the catalytic performances ofуCeO2/CuχCo1-χOδcatalysts for CO oxidation were investigated by XRD,BET,H2-TPR and XPS techniques.The results revealed that 15%CeO2/Cu0.2 Co0.8 Oδ〔m(CuO)∶m(Co3 O4)=0.2∶0.8〕catalyst exhibited the best catalytic performance due to its large specific surface area and two-phase interface.Larger interfaces led to the strong interaction between CeO2 and Cu0.2 Co0.8 Oδ.As a result,there were more oxygen holes,Cu^+and Co^3+on the surface,which decreased the reduction temperature of 15%CeO2/Cu0.2 Co0.8 Oδ.So,15%CeO2/Cu0.2 Co0.8 Oδcatalyst exhibited a higher catalytic activity in the CO oxidation with 100%CO conversion at temperature of 75℃ and a constant pressure.

关 键 词：CO催化氧化 CEO2 CuχCo1–χOδ 相互作用 Cu^+和Co^3+ 催化技术 

分 类 号：TQ032.41[化学工程]