Effect of V2O5 on the catalytic activity of Pt-based diesel oxidation catalyst

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We investigated the suppression of SO2 oxidation activity by vanadium oxide in Pt-based diesel oxidation catalyst using reaction experiments, temperature programmed desorption (TPD), infrared (IR) and X-ray photoelectron spectroscopy (XPS). There was no interaction between Pt and S indicated by the XPS results. SO2 was not adsorbed on Pt at room temperature indicated by the absence of peak arising from SO2 in SO2 TPD spectra. SO2 molecules were adsorbed on the hydroxyl groups of TiO2 and migrated to Pt particles to react with oxygen adsorbed on it. V2O5 decreased the adsorption of SO2 on TiO2 by the blockage of V2O5 on TiO2. (C) 2003 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2003-10
Language
English
Article Type
Article
Keywords

VANADIUM-OXIDE CATALYSTS; REACTIVITY; XPS

Citation

APPLIED CATALYSIS B-ENVIRONMENTAL, v.45, no.4, pp.269 - 279

ISSN
0926-3373
URI
http://hdl.handle.net/10203/250840
Appears in Collection
CBE-Journal Papers(저널논문)
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