Infrared Study of Benzene Hydrogenation on Pt/SiO₂ Catalyst by Co-adsorption of CO and Benzene

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• 作者：Ching-Shiun Chen ; Jarrn-Horng Lin ; Hsiu-Wei Chen and Chien-Yuan Wang
• 关键词：benzene hydrogenation ; CO adsorption ; FTIR ; Pt/SiO2
• 刊名：Catalysis Letters
• 出版时间：2005
• 出版年：2005
• 期刊代码：13_1011372X
• 类别：ch
• 卷：105
• 期：3/4
• 页码：149-155
• 数据来源：sp

摘要

FT-IR spectra of the co-adsorption of benzene and CO have been performed to identify the preferred adsorption sites of hydrogen and benzene on a Pt/SiO₂ catalyst for hydrogenation of benzene. Results of CO adsorbed on atop sites on Pt/SiO₂ includes: an α peak at 2091 cm−1, a β peak at 2080 cm−1 and a γ peak at 2067 cm−1 indicating three kinds of adsorption sites for dissociative hydrogen on Pt/SiO₂. The site of lowest CO stretching frequency offers stronger adsorbates–metal interaction for benzene and hydrogen. Hydrogen binding on the site of lowest CO stretching frequency before benzene adsorption significantly enhances the reaction rate of benzene hydrogenation.