催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (12): 1215-1220.

• 研究论文 • 上一篇    下一篇

介孔Ce1-xZrxO2负载的Cu基催化剂在富氢条件下催化CO选择性氧化

滕美玲,罗来涛   

  1. 南昌大学应用化学研究所, 江西南昌 330031
  • 收稿日期:2008-12-25 出版日期:2008-12-25 发布日期:2012-09-20

Catalytic Performance of Mesoporous Ce1-xZrxO2-Supported CuO-Based Catalyst for CO Selective Oxidation under H2-Rich Conditions

TENG Meiling, LUO Laitao*   

  1. Institute of Applied Chemistry, Nanchang University, Nanchang 330031, Jiangxi, China
  • Received:2008-12-25 Online:2008-12-25 Published:2012-09-20

PDF

1008

被引次数

15

摘要： 采用多元醇为模板剂合成了介孔Ce1-xZrxO2(x=0.2, 0.35, 0.5)固溶体材料,并以其为载体负载CuO制备了Cu基催化剂. 应用透射电子显微镜、X射线衍射、程序升温还原、程序升温脱附和N2吸附-脱附等技术对载体及催化剂进行了表征,并研究了Zr的取代比例x值对载体和Cu基催化剂性能的影响. 结果表明,所有Ce1-xZrxO2样品均为介孔材料,其中Ce0.5-Zr0.5O2载体样品有较大的比表面积(181 m2/g), CuO/Ce0.5Zr0.5O2催化剂样品在富氢条件下有较高的催化CO选择性氧化反应的活性和选择性. 与其他催化剂样品相比, CuO/Ce0.5Zr0.5O2催化剂样品中形成的活性中心更多,分散性更好,对CO的吸附量更大, CO脱附温度更低,活性组分与载体的相互作用更强.

关键词: 多元醇法, 介孔材料, 氧化铈, 氧化锆, 复合氧化物, 固溶体, 一氧化碳, 选择性氧化, 富氢

Abstract: Mesoporous Ce1-xZrxO2 (x=0.2, 0.35, 0.5) samples were syn thesized using polyol as the template, and CuO/Ce1-xZrxO2 catalyst samples were prepared by impregnation. The highest surface area of t he support and higher CO conversion and selec tivity of the Cu-based catalyst for CO selective oxidation under the H2-ric h conditions were obtained when x=0.5 owing to that the CuO/Ce0.5Zr 0.5O2 sample had the strongest interaction between the active component an d the support, the highest dispersion, and the most CO adsorption amount.

Key words: polyol method, mesoporous material, ceria, zirconia, composite oxide, solid solution, carbon monoxide, selective oxidation, hydrogen-rich