Alcohol Dehydration on Monooxo WO and Dioxo OWO Species
journal contributionposted 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 OWO groups, whereas monooxo WO 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 OWO species.