Influence of the synthesis parameters on the physico-chemical and catalytic properties of cerium oxide for application in the synthesis of聽diethyl carbonate

详细信息    查看全文

• 作者：Ewelina Leino ; Narendra Kumar ; P盲ivi M盲ki-Arvela ; Atte Aho ; Kriszti谩n Kord谩s ; Anne-Riikka Leino ; Andrey Shchukarev ; Dmitry Yu. Murzin ; Jyri-Pekka Mikkola
• 关键词：Inorganic compounds ; Photoelectron spectroscopy ; Surface properties ; Oxides
• 刊名：Materials Chemistry and Physics
• 出版年：16 December, 2013
• 年：2013
• 卷：143
• 期：1
• 页码：65-75
• 全文大小：2854 K

文摘

Synthesis of cerium (IV) oxide by means of room temperature precipitation method was carried out. The effect of preparation variables such as synthesis time, calcination temperature and pH of the solution on resulting CeO₂ properties was discussed. Moreover, the comparison of CeO₂ samples prepared in a static and rotation mode of synthesis is presented. The solid catalysts were characterized by means of X-ray powder diffraction, scanning electron microscopy, transmission electron microscope, nitrogen physisorption, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy using pyridine as a probe molecule and temperature programmed desorption of CO₂. Significant variations in physico-chemical properties of CeO₂ by varying the preparation conditions were observed. Furthermore, the catalytic performances of CeO₂ catalysts were compared in the synthesis of diethyl carbonate starting from ethanol and CO₂ using butylene oxide as a dehydrating agent. The dependence of CeO₂ properties on its catalytic activity is evaluated in detail.