| 光还原催化剂Pt/TiO2富氢条件下CO优先氧化反应 |
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| 引用本文： | 王芳,王彩红,刘国霞.光还原催化剂Pt/TiO2富氢条件下CO优先氧化反应[J].物理化学学报,2012,28(2):445-449. |
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| 作者姓名： | 王芳 王彩红 刘国霞 |
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| 作者单位： | Department of Chemistry & Chemical Engineering, Binzhou University, Binzhou 256603, Shandong Province, P. R. China |
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| 基金项目： | supported by the Research Fund of Binzhou University,China(2010Y06)~~ |
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| 摘 要： | 用光还原法来提高富氢条件下CO优先氧化(PROX)催化活性和CO2选择性,分别对有无氢气时CO氧化反应参数进行了详尽研究.X射线光电子能谱(XPS)表征结果显示,在光还原催化剂表面产生了部分氧空穴,可为化学吸附H提供活性中心.针对光还原Pt/TiO2催化剂上CO优先氧化反应提出了一种可能的双功能反应机理.
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| 关 键 词： | CO优先氧化 Pt催化剂 光还原 浸渍 |
| 收稿时间： | 2011-08-11 |
| 修稿时间： | 2011-11-24 |
Preferential Oxidation of CO over Photoreduced Pt/TiO2 Catalysts in H2-Rich Stream |
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| WANG Fang WANG Cai-Hong LIU Guo-Xia.Preferential Oxidation of CO over Photoreduced Pt/TiO2 Catalysts in H2-Rich Stream[J].Acta Physico-Chimica Sinica,2012,28(2):445-449. |
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| Authors: | WANG Fang WANG Cai-Hong LIU Guo-Xia |
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| Institution: | Department of Chemistry & Chemical Engineering, Binzhou University, Binzhou 256603, Shandong Province, P. R. China |
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| Abstract: | The optimum reaction parameters for CO oxidation in the presence and absence of H2 have been investigated by photoreduction method to enhance the catalytic activity and selectivity of CO2 for CO preferential oxidation(PROX) in H2-rich stream in detail.X-ray photoelectron spectroscoopy(XPS) results showed that part oxygen vacancies produced on the surface of photoreduced catalysts,which maybe the activity site for the chemisorbed H.Therefore,a possible bi-function reaction mechanism for CO preferential oxidation over the photoreduced Pt/TiO2 catalyst has been proposed. |
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| Keywords: | CO preferential oxidation Pt catalyst Photoreduction Impregnation |
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