Adsorption structure of acetic anhydride on a TiO2(110) surface observed by scanning tunneling microscopy

作者：Kinoshita Kumiko; Suzuki Shushi; Chun Wang Jae; Takakusagi Satoru; Asakura Kiyotaka^*

来源：Surface Science, 2009, 603(3): 552-557.

DOI：10.1016/j.susc.2008.12.019

• Scanning tunneling microscopy
• Adsorption
• Acetic anhydride
• TiO2(110)
• Acetate
• Carboxylic acid

The carboxylic acids are stably adsorbed on TiO2(110) surfaces at room temperature. To demonstrate the neutralization mechanism proposed by Ashima et al. [H. Ashima, W.-J. Chun, K. Asakura, Surf Sci. 601 (2007) 1822.] that explains the stable adsorption of carboxylic acids, we studied the full-coverage adsorption structure of acetic anhydride on a TiO2(110) surface by STM (scanning tunneling microscopy). We directly observed three postulated species on the TiO2(110) surface; normal acetates (termed acetate A) forming a (2 x 1) ordered structure, a minor acetate species (termed acetate B) which was present between the bridging oxygen and the 5-fold Ti, and the oxygen vacancies. We determined the ratio of these three species. This ratio was in good agreement with the postulated conversion reaction of acetate B to A.

• 出版日期2009-2-1