The role of defects in the photoconversion of 2-propanol on rutile titania: Operando spectroscopy combined with elementary studies

Kräuter J, Franz E, Waidhas F, Brummel O, Libuda J, Al-Shamery K (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Book Volume: 406

Pages Range: 134-144

DOI: 10.1016/j.jcat.2021.12.025

Abstract

Previous studies on the reaction chemistry of 2-propanol at rutile powders in liquid phase as well as at TiO2(1 1 0) surfaces under UHV conditions, both with low reduction degree, exhibited that partial photo oxidation is observable in the presence of oxygen, however, with low yields. Here, we show that at highly reduced surfaces a partial photo oxidation of 2-propanol is not only possible in the presence of oxygen but also in coadsorption with water or even without coadsorbates below room temperature. Thermally, only the conversion towards propane and propene was observed at temperatures above 550 K. Liquid Phase experiments further showed that the coadsorbate influences the acetone yield of the partial photo oxidation. While in the presence of oxygen an increasing acetone conversion was observed, the acetone yield is reduced in the presence of water in accordance with the hypothesis of an active site blocking by water.

Authors with CRIS profile

Involved external institutions

Carl von Ossietzky Universität Oldenburg Germany (DE)

How to cite

APA:

Kräuter, J., Franz, E., Waidhas, F., Brummel, O., Libuda, J., & Al-Shamery, K. (2022). The role of defects in the photoconversion of 2-propanol on rutile titania: Operando spectroscopy combined with elementary studies. Journal of Catalysis, 406, 134-144. https://doi.org/10.1016/j.jcat.2021.12.025

MLA:

Kräuter, Jessica, et al. "The role of defects in the photoconversion of 2-propanol on rutile titania: Operando spectroscopy combined with elementary studies." Journal of Catalysis 406 (2022): 134-144.

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