Alcohol Dehydration on Monooxo W鈺怬 and Dioxo O鈺怶鈺怬 Species

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• 作者：Zhenjun Li ; B艡etislav 艩m铆d ; Yu Kwon Kim ; Vladim铆r Matol铆n ; Bruce D. Kay ; Roger Rousseau ; Zdenek Dohn谩lek
• 刊名：The Journal of Physical Chemistry Letters
• 出版年：2012
• 出版时间：August 16, 2012
• 年：2012
• 卷：3
• 期：16
• 页码：2168-2172
• 全文大小：308K
• 年卷期：v.3,no.16(August 16, 2012)
• ISSN：1948-7185

文摘

The dehydration of 1-propanol on nanoporous WO₃ films prepared via ballistic deposition at 20 K has been investigated using temperature-programmed desorption, infrared reflection absorption spectroscopy, and density functional theory. The as-deposited films are extremely efficient in 1-propanol dehydration to propene. This activity is correlated with the presence of dioxo O鈺怶鈺怬 groups, whereas monooxo W鈺怬 species are shown to be inactive. Annealing of the films induces densification that results in the loss of catalytic activity due to the annihilation of O鈺怶鈺怬 species.

Keywords:

nanoporous films; tungsten trioxide; dehydration; TPD; IRAS; DFT