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Investigation of NO adsorption and NO/O2 co-adsorption on NO x -storage-components by DRIFT-spectroscopy

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Abstract

NO adsorption and NO/O2 co-adsorption on CeO2 at different temperatures was studied by DRIFT-Spectroscopy. The results indicate that this oxide plays an important role in storing NO x . FTIR studies show that NO adsorption is dominated by the formation of nitrite species. Furthermore, cis- and trans hyponitrite species are detected. Co-adsorption of NO/O2 leads to the formation of nitrates. The experimental data show that the formation of nitrates is a consecutive reaction: adsorption of NO to form nitrite species (NO2 −), followed by an oxidation to form nitrate species (NO3 −).

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Authors and Affiliations

  1. Department of Chemical Engineering and Macromolecular Science, Darmstadt University of Technology, Petersenstr. 20, 64287, Darmstadt, Germany

    S. Philipp, A. Drochner, J. Kunert & H. Vogel

  2. OMG, Rodenbacher Chaussee 4, 63403, Hanau, Germany

    J. Theis & E. S. Lox

Authors
  1. S. Philipp
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  2. A. Drochner
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  3. J. Kunert
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  4. H. Vogel
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  5. J. Theis
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  6. E. S. Lox
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Philipp, S., Drochner, A., Kunert, J. et al. Investigation of NO adsorption and NO/O2 co-adsorption on NO x -storage-components by DRIFT-spectroscopy. Topics in Catalysis 30, 235–238 (2004). https://doi.org/10.1023/B:TOCA.0000029755.35282.00

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  • DOI: https://doi.org/10.1023/B:TOCA.0000029755.35282.00

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