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나노물질 및 화학반응 연구단
나노물질 및 화학반응 연구단
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Chemical Doping of TiO2 with Nitrogen and Fluorine and Its Support Effect on Catalytic Activity of CO Oxidation

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Title
Chemical Doping of TiO2 with Nitrogen and Fluorine and Its Support Effect on Catalytic Activity of CO Oxidation
Author(s)
Kalyan C. Goddeti; Sun Mi Kim; Young Keun Lee; Sang Hoon Kim; Jeong Young Park
Publication Date
2014-08
Journal
CATALYSIS LETTERS, v.144, no.8, pp.1411 - 1417
Publisher
SPRINGER
Abstract
We investigated the effect of the support on catalytic activity for CO oxidation using platinum nanoparticles on doped and undoped titanium dioxide (TiO2). As a support, the undoped TiO2 was synthesized via the sol-gel process. The thin films were then chemically doped with non-metal anions, such as nitrogen (N) and fluorine (F). Thin films were prepared using the spin coating technique; characterization techniques including scanning electron microscopy, X-ray diffraction, UV-Vis absorption spectroscopy, and X-ray photoelectron spectroscopy (XPS) were carried out to examine the morphology of the films, crystal phase, crystallites, optical properties, and elemental composition, respectively. In particular, XPS analysis of the doped TiO2 thin films revealed that the nitrogen sites were interstitial whereas fluorine was doped substitutionally into TiO2 lattice. The Pt/N-, Pt/F-, and Pt/undoped TiO2 catalysts were fabricated by depositing platinum nanoparticles on N-, F-, and undoped TiO2 thin films using the arc plasma deposition technique. CO oxidation was carried out to elucidate the catalytic activity of the Pt nanoparticles. The turnover rates of Pt/N-, and Pt/F-doped TiO2 were a factor of similar to 2.5 higher than that of the Pt/undoped TiO2. We attribute the enhanced catalytic activity to oxygen vacancies fo
URI
https://pr.ibs.re.kr/handle/8788114/957
ISSN
1011-372X
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
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