Spontaneous and Photoinduced Conversion of CO2 on TiO2 Anatase (001)/(101) Surfaces

Kavan, Ladislav; Zukalová, Markéta; Zukal, Arnošt; Klementová, Mariana; Civiš, Svatopluk; Ferus, Martin

doi:https://dx.doi.org/10.1021/jp5090668

Number of the records: 1

Spontaneous and Photoinduced Conversion of CO2 on TiO2 Anatase (001)/(101) Surfaces

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SYSNO ASEP	0437179
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Spontaneous and Photoinduced Conversion of CO2 on TiO2 Anatase (001)/(101) Surfaces
Author(s)	Ferus, Martin (BFU-R) Kavan, Ladislav (UFCH-W)_{RID, ORCID} Zukalová, Markéta (UFCH-W)_{RID, SAI, ORCID} Zukal, Arnošt (UFCH-W)_RID Klementová, Mariana (UACH-T)_{RID, SAI, ORCID} Civiš, Svatopluk (UFCH-W)_{RID, ORCID, SAI}
Source Title	Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447 Roč. 118, č. 46 (2014), s. 26845-26850
Number of pages	6 s.
Language	eng - English
Country	US - United States
Keywords	TiO2 ; FT-IR spectroscopy ; nanocrystalline anatase
Subject RIV	CF - Physical ; Theoretical Chemistry
R&D Projects	GAP108/12/0814 GA ČR - Czech Science Foundation (CSF)
	LD14115 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	LD13060 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UFCH-W - RVO:61388955 ; UACH-T - RVO:61388980 ; BFU-R - RVO:68081707
UT WOS	000345474000047
EID SCOPUS	84914680362
DOI	10.1021/jp5090668
Annotation	High-resolution FT-IR spectroscopy was used to study the kinetics of oxygen mobility between gaseous isotopically labeled C18O2 and solid phase Ti16O2 nanocrystalline anatase (001). Analysis of the isotopic composition of the gases produced has revealed that anatase (001) calcinated at temperatures under 500 °C is a very weakly reactive material and exhibits a low exchange mobility of oxygen atoms between the gas phase molecules of CO2 and the TiO2 lattice. Isotope exchange is blocked by both residual HF adsorbed onto the TiO2 surface and TiOF2 impurities. The presence of TiOF2 was shown by TEM and X-ray diffraction. However, the anatase (001) sample became slightly active after annealing at temperatures higher than 500 °C and upon UV illumination. Nevertheless, the effective rate constant is still 3.45 times lower than that observed for the spontaneous exchange between C18O2 and anatase (101) material calcinated at 500 °C.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2015

Number of the records: 1