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Issue 33, 2013
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Imaging reactions of acetone with oxygen adatoms on partially oxidized TiO2(110)

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Abstract

Understanding the interaction of O2 with ketones on metal oxide surfaces is important for the photo-oxidation of toxic organic molecules. The consecutive reaction steps of acetone molecules with oxygen adatoms (Oa's) on partially oxidized TiO2(110) surfaces have been studied using high-resolution scanning tunneling microscopy (STM) at 300 K. The sequential isothermal STM images reveal two types of acetone–Oa species as a result of reactions of acetone with an oxygen adatom and a bridging bound oxygen vacancy (VO). One such species is the Ti5c-bound acetone–Oa diolate formed from Ti5c-bound acetone reacting with Oa. The diolate is mobile at 300 K and can assist the diffusion of surface Oa by exchanging the acetone oxygen with the Oa. The second acetone–Oa species is the VO-bound acetone–Oa complex formed from a VO-bound acetone reacting with an Oa located on the neighboring Ti row. The VO-bound complex is stationary at 300 K. This species has not been reported previously.

Graphical abstract: Imaging reactions of acetone with oxygen adatoms on partially oxidized TiO2(110)

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Publication details

The article was received on 19 Apr 2013, accepted on 17 Jun 2013 and first published on 18 Jun 2013


Article type: Paper
DOI: 10.1039/C3CP51695D
Citation: Phys. Chem. Chem. Phys., 2013,15, 13897-13901
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    Imaging reactions of acetone with oxygen adatoms on partially oxidized TiO2(110)

    Y. Xia, J. Ye, P. Murray, A. Ali, Q. Ge and Z. Zhang, Phys. Chem. Chem. Phys., 2013, 15, 13897
    DOI: 10.1039/C3CP51695D

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