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- W2231839564 abstract "Thermal- and photon-stimulated reactions of acetone coadsorbed with oxygen on rutile TiO2(110) surface are studied with infrared reflection–absorption spectroscopy (IRAS) combined with temperature-programmed desorption and angle-resolved photon stimulated desorption. IRAS results show that η2-acetone diolate ((CH3)2COO) is produced via thermally activated reactions between the chemisorbed oxygen and coadsorbed acetone. Formation of acetone diolate is also consistent with 18O/16O isotopic exchange experiments. During UV irradiation at 30 K, CH3 radicals are ejected from the acetone diolate with a distribution that is peaked at ∼±66° from the surface normal along the [11̅0] azimuth (i.e., perpendicular to the rows of bridging oxygen and Ti5c ions). This distribution is also consistent with the orientation of the C–CH3 bonds in the η2-acetone diolate on TiO2(110). The acetone diolate peaks disappear from the IRAS spectra after UV irradiation, and new peaks are observed and associated with η2-acetate. The data presented here demonstrate direct signatures of the previously-proposed two-step mechanism for acetone photooxidation on TiO2(110)." @default.
- W2231839564 created "2016-06-24" @default.
- W2231839564 creator A5016734798 @default.
- W2231839564 creator A5029632614 @default.
- W2231839564 creator A5053623972 @default.
- W2231839564 date "2015-05-19" @default.
- W2231839564 modified "2023-10-01" @default.
- W2231839564 title "Insights into Acetone Photochemistry on Rutile TiO<sub>2</sub>(110). 1. Off-Normal CH<sub>3</sub> Ejection from Acetone Diolate" @default.
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- W2231839564 doi "https://doi.org/10.1021/acs.jpcc.5b02477" @default.
- W2231839564 hasPublicationYear "2015" @default.
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