Study of Methanol Adsorption on Zirconia Polymorphs by FTIR
MA Zhong-yi1, 2,DONG Qing-nian1,YANG Cheng1,WEI Wei1,CHEN Jian-gang1,SUN Yu-han1
1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China 2. Graduate school of Chinese Academy of Sciences, Beijing 100039, China
Abstract：The influence of zirconia polymorphs on methanol adsorption was investigated by FTIR technique. One terminal and two types of bridged methoxyl were formed on the am-ZrO2 and t-ZrO2 samples, while another tribridged methoxyl species was detected on the m-ZrO2 sample. During the formation of methoxyl, bridged hydroxyl species on the am-ZrO2 and m-ZrO2 was more active, while the terminal one on the t-ZrO2 sample was more active. The methoxyl was oxygenated by surface oxygen ions to be formate and further to be carbonate on the m-ZrO2 and am-ZrO2 samples. But for t-ZrO2,methoxyl could be directly oxygenated to be carbonate at RT, which implied that the surface oxygen ions on t-ZrO2 were more active than those on the two other samples.
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