Imaging Adsorbate O−H Bond Cleavage: Methanol on TiO2(110)
- 10 March 2006
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 128 (13) , 4198-4199
- https://doi.org/10.1021/ja058466a
Abstract
We investigated methanol adsorption and dissociation on bridge-bonded oxygen vacancies of the TiO2(110)-(1×1) surface using in situ scanning tunneling microscopy. We provide the first direct evidence that methanol dissociates on oxygen vacancies via O−H bond scission rather than C−O scission. For CH3OH coverages lower than the oxygen vacancy concentration, stationary methoxy−hydroxyl pairs form. At CH3OH coverages close to the oxygen vacancy concentration undissociated mobile CH3OH interacts with methoxy−hydroxyl pairs and facilitates the movement of hydroxyl away from the methoxy group.Keywords
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