| 丙烯在Au/TiO2催化剂上的化学吸附与临氢环氧化反应 |
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| 引用本文： | 孙菲菲,钟顺和. 丙烯在Au/TiO2催化剂上的化学吸附与临氢环氧化反应[J]. 应用化学, 2003, 20(9): 849-0 |
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| 作者姓名： | 孙菲菲 钟顺和 |
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| 作者单位： | 天津大学 |
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| 基金项目： | 国家自然科学基金资助项目 ( 2 0 0 760 3 5 ) |
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| 摘 要： | 环氧丙烷;丙烯环氧化;丙烯在Au/TiO2催化剂上的化学吸附与临氢环氧化反应
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| 关 键 词： | 环氧丙烷 丙烯环氧化 丙烯在Au/TiO2催化剂上的化学吸附与临氢环氧化反应 |
| 文章编号： | 1000-0518(2003)09-0849-04 |
| 收稿时间： | 2009-06-29 |
| 修稿时间： | 2003-01-10 |
Chemsorption of Supported Au/TiO2 Catalyst in Direct Epoxidation of Propylene |
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| SUN Fei-Fei,ZHONG Shun-He. Chemsorption of Supported Au/TiO2 Catalyst in Direct Epoxidation of Propylene[J]. Chinese Journal of Applied Chemistry, 2003, 20(9): 849-0 |
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| Authors: | SUN Fei-Fei ZHONG Shun-He |
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| Affiliation: | SUN Fei-Fei,ZHONG Shun-He* |
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| Abstract: | The supported catalyst Au/TiO 2 was prepared by deposition-precipitation method. Chemsorbility of the catalyst was studied by in situ IR and TPD techniques and activity of the catalyst was tested in a micro- reactor. The results revealed that propylene is chemisorbed on Lewis acid sites Ti n+ on the surface of Au/TiO 2 through CC bond and newly formed propylene oxide is chemisorbed on Ti n+ through the oxygen of its epoxy ring. The selectivity of propylene oxide in propylene epoxidation over Au/TiO 2 is 93% and conversion of propylene is 0.76%. Au nano-particles adsorb H 2 and O 2 and transform them into peroxide species, which diffuse to Ti site, leading to the formation of propylene oxide. |
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| Keywords: | Au/TiO 2 propylene epoxidation |
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