催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (5): 407-413.

• 研究论文 • 上一篇    下一篇

Ce0.67Zr0.33O2材料的制备和表征及其负载单Pd三效催化剂的性能

赵波 1,2, 王秋艳 1, 葛昌华 2, 李光凤 1, 周仁贤 1   

  1. 1浙江大学催化研究所, 浙江杭州 310028 2台州学院医药化工学院, 浙江台州 317000
  • 出版日期:2009-05-25 发布日期:2013-02-05

Preparation and Characterization of Ce0.67Zr0.33O2 and the Activity of Its Sup-ported Only-Pd Three-Way Catalysts

ZHAO Bo1,2, WANG Qiuyan1, GE Changhua2, LI Guangfeng1, ZHOU Renxian1,*   

  1. 1Institute of Catalysis, Zhejiang University, Hangzhou 310028, Zhejiang, China 2School of Pharmaceutical and Chemical Engineering, Taizhou University, Taizhou 317000, Zhejiang, China
  • Online:2009-05-25 Published:2013-02-05

PDF

1041

被引次数

51

摘要： 采用共沉淀法、均匀沉淀法、微乳法和水热法四种方法制备了铈锆固溶体 (CZ), 对其进行了 X 射线衍射和 N2 吸附脱附分析. 以 CZ 为载体制备了负载单 Pd 三效催化剂, 并对催化剂进行了氧化还原性能测试. 结果表明, 制备方法对 CZ 载体的物理、化学性能有显著的影响, 而其负载单 Pd 催化剂的催化活性与 CZ 载体比表面积的大小没有明显的对应关系. 采用共沉淀法制备的 CZ 载体具有相对良好的热稳定性以及储放氧能力, 其负载单 Pd 催化剂在老化前后表面 PdO 物种有良好的还原性能, 并表现出优异的三效催化性能.

关键词: 氧化铈, 氧化锆, 制备方法, 钯, 三效催化剂

Abstract: This investigation focused on the effect of preparation methods for only-Pd/ Ce0.67Zr0.33O2 catalysts on the three-way reaction performance. The results showed that preparation methods have great effect on the support properties. The PdO species on Ce0.67Zr0.33O2 prepared by the co-precipitation method exhibited high reducibility before and after aging. The only-Pd catalysts have excellent three-way catalytic activity.

Key words: ceric oxide, zirconia, preparation method, palladium, three-way catalyst