催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (8): 1336-1341.DOI: 10.1016/S1872-2067(10)60251-3

• 研究论文 • 上一篇    下一篇

0, 1, 3 维 CeO2 的可控制备及 CuO/CeO2 催化剂上 CO 氧化反应

单文娟1,*, 刘畅1, 郭红娟1, 杨利华1, 王晓楠1, 冯兆池2   

  1. 1辽宁师范大学化学化工学院功能材料化学研究所, 辽宁大连 116029; 2中国科学院大连化学物理研究所催化基础国家重点实验室, 辽宁大连 116023
  • 收稿日期:2011-03-02 修回日期:2011-05-05 出版日期:2011-08-05 发布日期:2014-12-26

Synthesis of Zero, One, and Three Dimensional CeO2 Particles and CO Oxidation over CuO/CeO2

SHAN Wenjuan1,*, LIU Chang1, GUO Hongjuan1, YANG Lihua1, WANG Xiaonan1, FENG Zhaochi2   

  1. 1Institute of Chemistry for Functionalized Materials, College of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, Liaoning, China; 2State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2011-03-02 Revised:2011-05-05 Online:2011-08-05 Published:2014-12-26

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摘要： 以水、乙醇和乙二醇为溶剂, 采用溶剂热法可控制备了 0, 1, 3 维 CeO2. 结果表明, 0 维 CeO2 由 0.2~0.5 μm 纳米粒子组成; 1 维 CeO2 是直径为 25~30 μm, 长约 500 μm 的六方棒; 松针型的 3 维 CeO2 是由以纳米粒子为单元构成的直径为 1~5 µm, 长约 50 µm 的光滑棒组成, 其比表面积高达 234 m2/g. 将 0, 1, 3 维 CeO2 负载的 CuO 催化剂用于 CO 氧化反应中, 发现以 1 维和 3 维 CeO2 为载体时, CuO 催化剂具有较大的比表面积和较强的表面还原性, 因而表现出较高的催化活性.

关键词: 氧化铈, 氧化铜, 一氧化碳, 氧化, 纳米结构, 拉曼光谱

Abstract: A method to synthesize zero, one, and three dimensional (0D, 1D, 3D) CeO2 from single crystal cerium formate by a surfactant-free route using H2O, ethanol and ethylene glycol as solvents is shown. 0D CeO2 was composed of aggregated particles of 0.2–0.5 μm. 1D CeO2 was hexagonal rods that were 25–30 μm in width and more than 500 μm in length. The pine needle shaped 3D CeO2 was assembled from smooth rods of 1 to 5 µm diameter and up to 50 µm length that had CeO2 nanoparticles as building units to give 3D micro/nanocomposite structures with a high BET surface area of 234 m2/g. Both 5 wt% CuO/1D CeO2 and 5 wt% CuO/3D CeO2 exhibited high catalytic activities for CO conversion due to the high BET surface area and the facile reducibility of surface CeO2.

Key words: ceria, copper oxide, carbon monoxide, oxidation, nanostructure, Raman spectroscopy