催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (10): 997-1000.

• 研究论文 • 上一篇    下一篇

微波辅助法制备铈锆固溶体在CO低温氧化反应中的应用

杨志强, 毛东森, 朱慧琳, 卢冠忠   

  1. 上海应用技术学院化学与环境工程学院, 上海 200235
  • 收稿日期:2009-10-25 出版日期:2009-10-25 发布日期:2013-06-06

Application of Cerium-Zirconium Solid Solution Prepared by a Micro-wave-Assisted Method to CO Low-Temperature Oxidation

YANG Zhiqiang, MAO Dongsen*, ZHU Huilin, LU Guanzhong   

  1. School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 200235, China
  • Received:2009-10-25 Online:2009-10-25 Published:2013-06-06

PDF

1063

被引次数

36

摘要： 采用共沉淀法并分别结合室温老化、常规加热回流和微波辅助加热回流三种不同的处理方法制备了铈锆固溶体 Ce0.6Zr0.4O2, 并以其为载体制备了 CuO/Ce0.6Zr0.4O2 催化剂. 采用 N2 吸附、X 射线衍射和 H2 程序升温还原等技术对 Ce0.6Zr0.4O2 载体和 CuO/Ce0.6Zr0.4O2 催化剂的织构特性和可还原性进行了表征, 另外还考察了 CuO/Ce0.6Zr0.4O2 催化剂对 CO 低温氧化反应的催化活性. 结果表明, 采用微波辅助加热回流处理方法制备的 Ce0.6Zr0.4O2 载体具有最大的比表面积 (170.8 m2/g) 和孔容 (0.408 cm3/g), 以其为载体所制备的 CuO/Ce0.6Zr0.4O2 催化剂, 其 CuO 具有良好的分散性和低温可还原性, 在 CO 低温氧化反应中表现出最好的催化活性.

关键词: 铈锆固溶体, 微波, 加热回流, 一氧化碳, 低温氧化, 氧化铜催化剂

Abstract: Three different Ce0.6Zr0.4O2 solid solutions were prepared by the co-precipitation method combined with room temperature aging, conventional heating reflux, and microwave-assisted heating reflux and used as the supports to prepare CuO catalysts by an impregnation method. The textural and reductive properties of the Ce0.6Zr0.4O2 supports and CuO/Ce0.6Zr0.4O2 catalysts were characterized by N2 adsorption, X-ray diffraction, and temperature-programmed reduction by hydrogen. In addition, the catalytic activity of the catalysts for CO low-temperature oxidation was tested. The results showed that the support prepared by the microwave-assisted method has the largest surface area and pore volume (170.8 m2/g and 0.408 cm3/g, respectively), and the CuO species loaded exhibited good dispersion and reducibility, which resulted in a high catalytic activity of the corresponding CuO/Ce0.6Zr0.4O2 catalyst for CO low-temperature oxidation.

Key words: cerium-zirconium solid solution, microwave, heating reflux, carbon monoxide, low-temperature oxidation, copper oxide catalyst