Autors: Stefanov, B. I., Topalian, Z., Granqvist, C.G., Österlund, L.
Title: Acetaldehyde adsorption and condensation on anatase TiO2: Influence of acetaldehyde dimerization
Keywords: TiO2, Acetaldehyde, Dimer, Adsorption, DFT, FTIR

Abstract: Conversion of acetaldehyde to crotonaldehyde on anatase TiO2 films was studied by in situ Fourier transform infrared (FTIR) spectroscopy and by density functional theory (DFT) calculations. In situ FTIR showed that acetaldehyde adsorption is accompanied by the appearance of a hitherto non-assigned absorption band at 1643 cm−1, which is shown to be due to acetaldehyde dimers. The results were supported by DFT calculations. Vibrational frequencies calculated within a partially relaxed cluster model for molecular acetaldehyde and its dimer, and for the corresponding adsorbed species on the anatase (1 0 1) surface, were in good agreement with experimental results. A kinetic model was constructed based on the combined FTIR and DFT results, and was shown to explain the essential features of the acetaldehyde condensation reaction.

References

    Issue

    Journal of Molecular Catalysis A: Chemical, vol. 381, pp. 77-88, 2014, Netherlands, Elsevier, ISSN 1381-1169

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    Вид: статия в списание, публикация в издание с импакт фактор, публикация в реферирано издание, индексирана в Scopus и Web of Science