不同晶相结构和形貌TiO2负载Ru催化剂的CO选择甲烷化

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TiO2SHTiO2-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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Bibliographic Details
Published in化学物理学报 Vol. 25; no. 4; pp. 475 - 480
Main Author 王桂英 高玉仙 汪文栋 黄伟新
Format Journal Article
LanguageChinese
Published 2012
Subjects
CO选择甲烷化
Ru催化剂
二氧化钛
微结构
Online AccessGet full text
ISSN1674-0068
2327-2244

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Summary: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TiO2SHTiO2-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．
Bibliography:Gui-ying Wang, Yu-xian Gao, Wen-dong Wang Wei-xin Huang （CAS Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China）
Nanostructured titanium dioxides were synthesized via various post-treatments of titanate nanofibers obtained from titanium precursors by hydrothermal reactions. The microstructures 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 determined. 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 di
ISSN:1674-0068
2327-2244