| AVS 54th International Symposium | |
| Surface Science | Monday Sessions |
| Session SS1-MoM |
| Session: | Catalysis on Clusters and Nanoparticles |
| Presenter: | Y.K. Kim, University of Texas at Austin |
| Authors: | Y.K. Kim, University of Texas at Austin B.D. Kay, Pacific Northwest National Laboratory J.M. White, University of Texas at Austin Z. Dohnálek, Pacific Northwest National Laboratory |
| Correspondent: | Click to Email |
The catalytic dehydration of alcohols on rutile TiO2(110) and on monodispersed (WO3)3 clusters on TiO2(110) was studied using reactive scattering and temperature-programmed desorption (TPD). Two distinct dehydration channels, one at low temperature (LT) and the other at high temperature (HT), are observed on TiO2(110). The LT and HT channels are shown to be related to reactions on the Ti4+ rows and on the vacancies of bridge-bonded oxygen (BBO) rows, respectively. The dehydration rates are shown to be influenced by the inductive and steric effects introduced by the hydrocarbon chains of the reacting alcohols. For the (WO3)3/TiO2(110) model catalyst, we find a dramatic increase in catalytic activity compared to bare TiO2(110). The quantitative correlation between the coverage of (WO3)3 clusters and the dehydration yield indicates that the W6+ Lewis acid sites are involved in the reaction.
1The research described in this presentation was performed in the Environmental Molecular Sciences Laboratory, a national scientific user facility sponsored by the Department of Energy's Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory.