We investigated methanol adsorption and dissociation on bridge-bonded oxygen vacancies of 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
Revised: April 7, 2011 |
Published: April 5, 2006
Citation
Zhang Z., O. Bondarchuk, J.M. White, B.D. Kay, and Z. Dohnalek. 2006.Imaging Adsorbate O-H Bond Cleavage: Methanol on TiO2(110).Journal of the American Chemical Society 128, no. 13:4198-4199.PNNL-SA-47892.doi:10.1021/ja058466a