An in situ infrared study of dimethyl carbonate synthesis from carbon dioxide and methanol over well-shaped CeO₂

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• 作者：Shu-Yang Zhao ; Sheng-Ping Wang ; ^{spwang@tju.edu.cn} ; Yu-Jun Zhao ; Xin-Bin Ma
• 关键词：Dimethyl carbonate ; CeO2 ; OH ; Bidentate carbonate ; Crystal planes
• 刊名：Chinese Chemical Letters
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：28
• 期：1
• 页码：65-69
• 全文大小：566 K
• 卷排序：28

文摘

The mechanism of dimethyl carbonate (DMC) formation from CO2 and methanol is investigated using three well-shaped CeO2 catalysts, nanorod, nanocube and octahedron, which are packed with different crystal planes. In situ Fourier Transform Infrared Spectroscopy (FTIR) is employed to probe each reaction step in the DMC synthesis. The number of OH groups and the species of CO2 adsorptions on ceria surface have significant influence on the activity of ceria with different morphologies. Rod-ceria has favorable catalytic activity because of the large amount of OH groups and the formation of bidentate carbonate species.