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Alcohol Dehydration on Monooxo WO and Dioxo OWO Species

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journal contribution
posted on 16.12.2015, 21:45 by Zhenjun Li, Břetislav Šmíd, Yu Kwon Kim, Vladimír Matolín, Bruce D. Kay, Roger Rousseau, Zdenek Dohnálek
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WO groups, whereas monooxo WO 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WO species.