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Infrared Study of Benzene Hydrogenation on Pt/SiO2 Catalyst by Co-adsorption of CO and Benzene |
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| Authors: | Ching-Shiun Chen Jarrn-Horng Lin Hsiu-Wei Chen Chien-Yuan Wang |
| Affiliation: | (1) Center for General Education, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan Tao-Yuan, 33302, Taiwan, Republic of China;(2) Center of Research and Technology, Tzu Hui Institute of Technology, 367, San Ming Road, Nanjou Shiang, Ping Tung, 92641, Taiwan, Republic of China;(3) Department of Chemistry, National Sun Yat-Sen University, 70 Lien Hai Road, Kaohsiung, 80424, Taiwan, Republic of China |
| Abstract: | 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. |
| Keywords: | benzene hydrogenation CO adsorption FTIR Pt/SiO2 |
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