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- W2092864464 abstract "On 100 K rutile TiO2(1 1 0) surfaces with 3.5 ± 0.5% surface bridge-bonded oxygen vacancies (BBOV’s), propene formation by dehydration of 2-propanol was monitored by temperature programmed desorption (TPD). The BBOV’s were either filled or unfilled when the 2-propanol was dosed. Propene desorption rates exhibit two local maxima, nominally at 350 (LT) and 570 K (HT). The former is not altered by filling BBOV’s while the latter is reduced by factors of 2.5 and 5 when the vacancies are pre-filled with water (H–OH) and alcohol (R–OH), respectively. The HT process is attributed to a reaction of 2-propoxy groups located on surface BBO’s. To account for much of the HT C3H6 yield when BBOV’s are filled before (CH3)2CHOH dosing, we propose a model whereby, during TPD, vacancies form and are filled with 2-propoxy. The factor of two difference between titrating BBOV’s with H2O and alcohols is attributed to stoichiometry; twice as many OH groups form on surface BBO rows when H2O is used so twice as many vacancies are created when OH recombines." @default.
- W2092864464 created "2016-06-24" @default.
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- W2092864464 date "2008-01-01" @default.
- W2092864464 modified "2023-10-16" @default.
- W2092864464 title "2-Propanol dehydration on TiO2(110): The effect of bridge-bonded oxygen vacancy blocking" @default.
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- W2092864464 doi "https://doi.org/10.1016/j.susc.2007.10.049" @default.
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