催化学报 ›› 2012, Vol. 33 ›› Issue (7): 1069-1074.DOI: 10.1016/S1872-2067(11)60404-X

• 研究快讯 • 上一篇    下一篇

氧化铈的结构对其热稳定性及催化丙烷氧化脱氢反应性能的影响

高旭锋, 谌春林, 任士远, 张建a, 苏党生b   

  1. 中国科学院金属研究所沈阳材料科学国家 (联合) 实验室, 辽宁沈阳 110016
  • 收稿日期:2012-04-20 修回日期:2012-05-02 出版日期:2012-06-21 发布日期:2012-06-21

Structural Effects of Cerium Oxides on Their Thermal Stability and Catalytic Performance in Propane Oxidation Dehydrogenation

GAO Xufeng, CHEN Chunlin, REN Shiyuan, ZHANG Jiana, SU Dangshengb   

  1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China
  • Received:2012-04-20 Revised:2012-05-02 Online:2012-06-21 Published:2012-06-21

摘要: 采用湿化学法制备了低维氧化铈的纳米棒和纳米颗粒, 通过原位 X 射线粉末衍射、透射电镜和 N2 物理吸附等技术研究了氧化铈纳米结构对其热稳定性的影响. 结果表明, 氧化铈纳米棒的稳定性更高. 采用浸渍法制备了氧化铈负载的氧化钒催化剂, 并用于丙烷氧化脱氢反应中, 发现以氧化铈纳米棒为载体的催化剂表现出更高的丙烯选择性, 这可能是由于棒状结构的开放性有利于产物丙烯的直接扩散.

关键词: 氧化铈, 纳米结构, 热稳定性, 丙烷, 氧化脱氢

Abstract: The low-dimensional ceria nanorods and nanoparticles were prepared by wet chemical methods. The structural effect on the thermal stability of CeO2 has been well investigated by in situ X-ray powder diffraction, transmission electron microscopy, and N2 physisorption, revealing a superior stability of CeO2 nanorods. CeO2-supported V2O5 catalysts were prepared by the incipient wetness impregnation method and their catalytic performance in the oxidative dehydrogenation of propane was evaluated. The V2O5/CeO2 nanorods catalysts display an improved selectivity for propene, probably arising from the immediate diffusion of propene product due to the open characteristic of rod-like structure.

Key words: cerium oxide, nanostructure, thermal stability, propane, oxidation dehydrogenation