Spontaneous and Photoinduced Conversion of CO2 on TiO2 Anatase

0506996 - ÚFCH JH 2020 RIV US eng C - Conference Paper (international conference)
Civiš, Svatopluk - Ferus, Martin
Spontaneous and Photoinduced Conversion of CO2 on TiO2 Anatase.
International Conference on Transparent Optical Networks-ICTON. In: 17TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON). New York: IEEE, 2015, (2015), č. článku 7193632. International Conference on Transparent Optical Networks. ISBN 978-1-4673-7880-2. ISSN 2162-7339.
[International Conference on Transparent Optical Networks (ICTON 2015) /17./. Budapest (HU), 05.07.2015-09.07.2015]
Institutional support: RVO:61388955
Keywords : surface defect * 1st step * laser * spectroscopy * decomposition * nanocrystal * formamide * structure and reactions of adsorbates
OECD category: Physical chemistry

Spontaneous isotopic exchange of oxygen atoms between gaseous (CO2)-O-18 and (TiO2)-O-16 nanoparticles has been studied using high-resolution Fourier transform infrared absorption and first principles density functional theory calculations. The rate of formation of gaseous (CO2)-O-16 is found to be highly dependent on the nature of the titania sample, growing with increasing calcination temperature for both amorphous and crystalline nanoparticles. This is attributed to an increase in the population of oxygen atom defects and for uncoordinated sites at higher calcination temperatures. Additional support for the experimental observations is provided by calculations of the activation barriers for oxygen exchange on crystalline anatase and on a (TiO2)(10) cluster.
Permanent Link: http://hdl.handle.net/11104/0298106