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Updated: Feb 25, 2026

The Effect of Interfacial Chemical Bonding in TiO2-SiO2 Composites on Their Photocatalytic NOx Abatement Performance
Published on: July 4, 2017
Ab Initio energetics of SiO bond cleavage
Carolin Hühn1, Andreas Erlebach1, Dorothea Mey1
1Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Löbdergraben 32, Jena, D-07743, Germany.
Abstract:
A multilevel approach that combines high-level ab initio quantum chemical methods applied to a molecular model of a single, strain-free SiOSi bridge has been used to derive accurate energetics for SiO bond cleavage. The calculated SiO bond dissociation energy and the activation energy for water-assisted SiO bond cleavage of 624 and 163 kJ mol-1 , respectively, are in excellent agreement with values derived recently from experimental data. In addition, the activation energy for H2 O-assisted SiO bond cleavage is found virtually independent of the amount of water molecules in the vicinity of the reaction site. The estimated reaction energy for this process including zero-point vibrational contribution is in the range of -5 to 19 kJ mol-1 . © 2017 Wiley Periodicals, Inc.
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