物理化学学报 >> 2012, Vol. 28 >> Issue (02): 433-436.doi: 10.3866/PKU.WHXB201112062

催化和表面科学 上一篇    下一篇

ZrO2修饰Cu催化剂对甲醇吸附原位红外表征

吴贵升1, 毛东森1, 卢冠忠1, 曹勇2, 范康年2   

  1. 1. 上海应用技术学院化学与环境工程学院应用催化研究所, 上海 201418;
    2. 复旦大学化学系, 上海 200433
  • 收稿日期:2011-10-17 修回日期:2011-11-25 发布日期:2012-01-11
  • 通讯作者: 吴贵升, 卢冠忠 E-mail:gzhlu@ecust.edu.cn; gswu@sit.edu.cn
  • 基金资助:

    上海重点学科(J51503)和上海市分子催化和功能材料重点实验室(2009KF06)资助项目

In situ Infrared Characterization of Methanol Adsorption on ZrO2 Modified Cu Catalysts

WU Gui-Sheng1, MAO Dong-Sen1, LU Guan-Zhong1, CAO Yong2, FAN Kang-Nian2   

  1. 1. Research Institute of Applied Catalysis, Academy of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, P. R. China;
    2. Department of Chemistry, Fudan University, Shanghai 200433, P. R. China
  • Received:2011-10-17 Revised:2011-11-25 Published:2012-01-11
  • Contact: WU Gui-Sheng, LU Guan-Zhong E-mail:gzhlu@ecust.edu.cn; gswu@sit.edu.cn
  • Supported by:

    The project was supported by the Shanghai Leading Academic Discipline Project, China (J51503) and Key Laboratory Project of Shanghai Molecular Catalysis and Function Materials, China (2009KF06).

摘要: 通过原位红外漫反射实验比较研究了甲醇在Cu及ZrO2/Cu催化剂表面的吸附与反应, 并且采用不同还原温度来处理催化剂, 改变催化剂表面的氧含量, 并进一步研究甲醇吸附和反应性能随着催化剂表面氧含量的变化规律. 结果表明, 甲醇在Cu催化剂表面反应生成吸附态甲醛物种, 进一步生成CO2, 而在ZrO2/Cu 表面形成甲酸盐物种, 并与表面氧进一步反应生成CO2. 随着催化剂还原温度的升高, 反应中间物进一步生成CO2的反应速率变慢, 说明催化剂表面的氧物种含量决定着催化剂甲醇吸附中间物种的形成及反应速率.

关键词: 甲醇吸附, 原位红外漫反射, Cu, ZrO2/Cu

Abstract: The adsorption and reaction of methanol on Cu and ZrO2/Cu were investigated using in situ infrared diffuse reflectance spectroscopy, in which the catalysts were reduced at different temperatures in order to change the content of surface oxygen species and investigate the change trends of methanol adsorption and reaction over the catalysts with the oxygen species content. The results show that methanol is adsorbed on the surface of Cu to produce CO2 via the intermediate of adsorbed formaldehyde, while the intermediate of formate is formed on the surface of ZrO2/Cu. The production rate of CO2 via the intermediate becomes slower with the rise of the reduction temperature of the catalysts, illustrating that the content of oxygen species on the surface of the catalysts determines the formation of the intermediate and the reaction rate.

Key words: Methanol adsorption, In situ infrared diffuse reflectance, Cu, ZrO2/Cu

MSC2000: 

  • O643