Cu掺杂铈基材料的乙醇完全氧化活性及热稳定性(英文)  

Complete Oxidation of Ethanol and Thermal Stability of Ceria-Based Materials Modified by Doping Cu

作　　者：王建强[1,2] 沈美庆[1,3] 王军[1] 王务林[2] 贾莉伟 

机构地区：[1]天津大学化工学院,绿色合成与转化教育部重点实验室,天津300072 [2]中国汽车技术研究中心,天津300162 [3]天津大学内燃机国家重点实验室,天津300072 [4]无锡威孚环保催化剂有限公司,江苏无锡214028

出　　处：《物理化学学报》2010年第8期2249-2254,共6页Acta Physico-Chimica Sinica

基　　金：supported by the National High-Tech Research and Development Program of China (863) (2009AA064803)~~

摘　　要：考察了采用溶胶-凝胶法制备固溶体Cu0.1Ce0.9Ox和Cu0.1Ce0.6Zr0.3Ox样品的乙醇完全氧化(COE)性能.采用X射线衍射(XRD)、BET比表面积、拉曼(Raman)、氢气程序升温还原(H2-TPR)、光电子能谱(XPS)及电子顺磁共振(EPR)技术对样品结构进行了表征.结果表明:新鲜Cu0.1Ce0.9Ox样品的乙醇完全氧化活性优于Cu0.1Ce0.6Zr0.3Ox;样品经过老化处理后,结果相反;Zr的加入改善了样品的热稳定性.此外,还考察了乙醇完全氧化活性与活性物种之间的关系.The complete oxidation of ethanol （COE） was studied over Cu0.1Ce0.9Ox and Cu0.1Ce0.6Zr0.3Ox catalysts prepared by the sol-gel method. Samples were characterized by X-ray powder diffraction （XRD）, Brunauer-Emmett-Teller （BET） adsorption, Raman spectroscopy, hydrogen temperature-programmed reduction （H2-TPR）, X-ray photoelectron spectroscopy （XPS）, and electron paramagnetic resonance （EPR）. Results show that for fresh samples, the activity of COE is found to be superior over Cu0.1Ce0.9Ox than over Cu0.1Ce0.6Zr0.3Ox whereas this is reversed for aged samples. The thermal stability improves after the introduction of Zr. Furthermore, the relationship between the active species and the activity for COE was investigated.

关 键 词：Cu0.1Ce0.9Ox Cu0.1Ce0.6Zr0.3Ox 乙醇完全氧化 热稳定性 

分 类 号：O643.36[理学—物理化学]