| ZrO2修饰Cu催化剂对甲醇吸附原位红外表征 |
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| 引用本文： | 吴贵升,毛东森,卢冠忠,曹勇,范康年.ZrO2修饰Cu催化剂对甲醇吸附原位红外表征[J].物理化学学报,2012,28(2):433-436. |
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| 作者姓名： | 吴贵升 毛东森 卢冠忠 曹勇 范康年 |
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| 作者单位： | 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 |
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| 基金项目： | 上海重点学科(J51503);上海市分子催化和功能材料重点实验室(2009KF06)资助项目~~ |
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| 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.
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| 关 键 词： | 甲醇吸附 原位红外漫反射 Cu ZrO2/Cu |
| 收稿时间： | 2011-10-17 |
| 修稿时间： | 2011-12-06 |
In situ Infrared Characterization of Methanol Adsorption on ZrO2 Modified Cu Catalysts |
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| WU Gui-Sheng,MAO Dong-Sen,LU Guan-Zhong,CAO Yong,FAN Kang-Nian.In situ Infrared Characterization of Methanol Adsorption on ZrO2 Modified Cu Catalysts[J].Acta Physico-Chimica Sinica,2012,28(2):433-436. |
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| Authors: | WU Gui-Sheng MAO Dong-Sen LU Guan-Zhong CAO Yong FAN Kang-Nian |
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| Institution: | 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 |
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| 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. |
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| Keywords: | Methanol adsorption In situ infrared diffuse reflectance Cu ZrO2/Cu |
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