ZrO2修饰Cu催化剂对甲醇吸附原位红外表征

doi:10.3866/PKU.WHXB201112062

Abstract

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

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 Phys. -Chim. Sin., 2012, 28(02): 433-436.

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

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

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