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首页> 外文期刊>RSC Advances >Pd catalyst supported on CeO2 nanotubes with enhanced structural stability toward oxidative carbonylation of phenol
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Pd catalyst supported on CeO2 nanotubes with enhanced structural stability toward oxidative carbonylation of phenol

机译：Pd催化剂在CeO2纳米管上负载，具有增强的苯酚的氧化羰基化的结构稳定性

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摘要

Ordered CeO2 nanotubes (CeO2-T) were prepared via a hydrothermal synthesis process using the triblock copolymer polyethylene oxide-polypropylene oxide-polyethylene oxide (P123) as a morphology control agent. CeO2-T characterization demonstrated the formation of single crystal structures having lengths between 1-3 m and diameters < 100 nm. A supported Pd catalyst (Pd/CeO2-T) was also prepared through hydrothermal means. H-2-temperature reduction profile and Raman spectroscopy analyses showed that the oxygen vacancies on the CeO2 surface increased and the reduction temperature of the surface oxygen decreased after Pd loading onto CeO2-T. Pd/CeO2-T was employed as a catalyst toward the oxidative carbonylation of phenol and the reaction conditions were optimized. Phenol conversion was 53.2% with 96.7% selectivity to diphenyl carbonate under optimal conditions. The integrity of the tubular CeO2 structure was maintained after the catalyst was recycled, however, both activity and selectivity significantly decreased, which was mainly attributed to the Pd active component significantly leaching during the reaction.
机译：通过使用三嵌段共聚物聚环氧丙烷 - 聚环氧丙烷（P123）作为形态对照剂，通过水热合成方法制备订购的CeO2纳米管（CeO2-T）。 CEO2-T表征证明了单晶结构的形成长度在1-3米和直径<100nm之间。还通过水热装置制备支持的Pd催化剂（Pd / CeO2-T）。 H-2 - 温度降低曲线和拉曼光谱分析显示CEO2表面上的氧空位增加，并且在PD加载到CeO2-T上后表面氧的还原温度降低。 Pd / CeO2-T作为磷酸化羰基化的催化剂，优化反应条件。苯酚转化率为53.2％，在最佳条件下对二苯基碳酸酯选择性为96.7％。在催化剂再循环后保持管状CeO2结构的完整性，但是，活性和选择性显着降低，其主要归因于在反应过程中显着浸出的Pd活性组分。

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  • 来源
    《RSC Advances》 |2019年第20期|共9页
  • 作者

    Fu Zengjie; Wang Zhimiao; Wang Hongjuan; Li Fang; Xue Wei; Wang Yanji;

  • 作者单位

    Hebei Univ Technol Tianjin Key Lab Chem Proc Safety Hebei Prov Key Lab Green Chem Technol &

    High Effi Tianjin 300130 Peoples R China;

    Hebei Univ Technol Tianjin Key Lab Chem Proc Safety Hebei Prov Key Lab Green Chem Technol &

    High Effi Tianjin 300130 Peoples R China;

    Hebei Univ Technol Tianjin Key Lab Chem Proc Safety Hebei Prov Key Lab Green Chem Technol &

    High Effi Tianjin 300130 Peoples R China;

    Hebei Univ Technol Tianjin Key Lab Chem Proc Safety Hebei Prov Key Lab Green Chem Technol &

    High Effi Tianjin 300130 Peoples R China;

    Hebei Univ Technol Tianjin Key Lab Chem Proc Safety Hebei Prov Key Lab Green Chem Technol &

    High Effi Tianjin 300130 Peoples R China;

    Hebei Univ Technol Tianjin Key Lab Chem Proc Safety Hebei Prov Key Lab Green Chem Technol &

    High Effi Tianjin 300130 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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