| 不同晶相结构和形貌TiO2负载Ru催化剂的CO选择甲烷化 |
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| 引用本文： | 王桂英,高玉仙,汪文栋,黄伟新.不同晶相结构和形貌TiO2负载Ru催化剂的CO选择甲烷化[J].化学物理学报,2012,25(4):475-480. |
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| 作者姓名： | 王桂英 高玉仙 汪文栋 黄伟新 |
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| 作者单位： | 中国科学技术大学化学物理系，中国科学院能量转换材料重点实验室，合肥230026;中国科学技术大学化学物理系，中国科学院能量转换材料重点实验室，合肥230026;中国科学技术大学化学物理系，中国科学院能量转换材料重点实验室，合肥230026;中国科学技术大学化学物理系，中国科学院能量转换材料重点实验室，合肥230026 |
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| 摘 要： | 用水热法得到的钛酸纳米纤维前体，通过不同后处理方法合成了多种纳米结构的TiO2．采用N2等温吸附和BET比表面、X射线衍射、透射电镜和能量分散X射线分析表征了TiO2及负载Ru催化剂的微结构，包括比表面、晶相结构和形貌以及Ru纳米颗粒尺寸分布等．对负载Ru催化剂在富氢条件下CO选择甲烷化反应活性测试表明：金红石相TiO2和TiO2-B为载体负载的Ru催化剂比锐钛矿相TiO2负载的Ru催化剂表现出更高的反应性能．其活性区别说明了不同晶相结构和形貌TiO2载体与Ru纳米颗粒的相互作用存在差异．
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| 关 键 词： | CO选择甲烷化，Ru催化剂，二氧化钛，微结构 |
| 收稿时间： | 2012/5/28 0:00:00 |
Selective CO Methanation over Ru Catalysts Supported on Nanostructured TiO2 with Different Crystalline Phases and Morphology |
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| Gui-ying Wang,Yu-xian Gao,Wen-dong Wang and Wei-xin Huang.Selective CO Methanation over Ru Catalysts Supported on Nanostructured TiO2 with Different Crystalline Phases and Morphology[J].Chinese Journal of Chemical Physics,2012,25(4):475-480. |
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| Authors: | Gui-ying Wang Yu-xian Gao Wen-dong Wang and Wei-xin Huang |
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| Institution: | CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University
of Science and Technology of China, Hefei 230026, China;CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University
of Science and Technology of China, Hefei 230026, China;CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University
of Science and Technology of China, Hefei 230026, China;CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University
of Science and Technology of China, Hefei 230026, China |
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| Abstract: | Nanostructured titanium dioxides were synthesized via various post-treatments of titanate nanofibers obtained from titanium precursors by hydrothermal reactions. The microstruc-tures of TiO2 and supported Ru/TiO2 catalysts were characterized with X-ray diffraction, transmission electron microscopy, energy-dispersive X-ray analysis, and nitrogen adsorption isotherms. The phase structure, particle size, morphology, and specific surface area were de-termined. The supported Ru catalysts were applied for the selective methanation of CO in a hydrogen-rich stream. The results indicated that the Ru catalyst supported on rutile and TiO2-B exhibited higher catalytic performance than the counterpart supported on anatase, which suggested the distinct interaction between Ru nanoparticles and TiO2 resulting from different crystalline phases and morphology. |
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| Keywords: | Selective CO methanation Ru catalyst Titanium dioxide Microstructure |
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