Issue 35, 2015

Ethanol photocatalysis on rutile TiO2(110): the role of defects and water

Abstract

In this work we present a stoichiometric reaction mechanism for the photocatalytic ethanol oxidation on TiO2(110). The reaction products are analyzed either under reaction conditions or after irradiation at lower temperatures. Water is identified as a quantitative by-product, which resides in a defect site. These water molecules cause a blocking of the defect sites which results in poisoning of the catalyst. By different preparation techniques of the TiO2(110) surface, the role of surface defects is further elucidated and the role of molecular oxygen is investigated. Based on the investigation, a complete photochemical reaction mechanism is given, which provides insights into general photon driven oxidation mechanisms on TiO2.

Graphical abstract: Ethanol photocatalysis on rutile TiO2(110): the role of defects and water

Article information

Article type
Paper
Submitted
19 Jun 2015
Accepted
30 Jul 2015
First published
30 Jul 2015
This article is Open Access
Creative Commons BY license

Phys. Chem. Chem. Phys., 2015,17, 22809-22814

Ethanol photocatalysis on rutile TiO2(110): the role of defects and water

C. A. Walenta, S. L. Kollmannsberger, J. Kiermaier, A. Winbauer, M. Tschurl and U. Heiz, Phys. Chem. Chem. Phys., 2015, 17, 22809 DOI: 10.1039/C5CP03550C

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