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NO x adsorption study over Pt–Ba/alumina catalysts: FT-IR and reactivity study

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Abstract

The NO x storage process over Ba/Al2O3 and Pt–Ba/Al2O3 NSR catalysts has been analyzed in this study by performing experiments at 350 °C with NO2 and NO/O2 mixtures using different complementary techniques (Transient Response Method, in situ FT–IR and DRIFT spectroscopies).

The collected data suggest that over the Pt–Ba/Al2O3 catalyst the NO x storage process from NO/O2 mixtures occurs forming at first nitrite species, which progressively evolve to nitrates. In addition, a parallel nitrate formation via disproportionation of NO2 (formed upon NO oxidation) cannot be excluded.

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Authors and Affiliations

  1. Dip.CMIC “G. Natta”, Politecnico di Milano, P.za L. da Vinci 32, 20133, Milano, Italy

    I. Nova, L. Castoldi, L. Lietti, E. Tronconi & P. Forzatti

  2. Dip. di Chimica IFM, Università di Torino, Via P. Giuria 7, 10125, Torino, Italy

    F. Prinetto & G. Ghiotti

  3. ISTM-CNR, Via C. Golgi 19, 20133, Milano, Italy

    V. Dal Santo & R. Psaro

  4. Dip. Scienze CC, FF, MM, Università dell’Insubria, Via Valleggio 11, 22100, Como, Italy

    S. Recchia

Authors
  1. I. Nova
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  2. L. Castoldi
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  3. F. Prinetto
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  4. V. Dal Santo
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  5. L. Lietti
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  6. E. Tronconi
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  7. P. Forzatti
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  8. G. Ghiotti
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  9. R. Psaro
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  10. S. Recchia
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Correspondence to I. Nova.

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Nova, I., Castoldi, L., Prinetto, F. et al. NO x adsorption study over Pt–Ba/alumina catalysts: FT-IR and reactivity study. Topics in Catalysis 30, 181–186 (2004). https://doi.org/10.1023/B:TOCA.0000029747.17327.2c

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  • DOI: https://doi.org/10.1023/B:TOCA.0000029747.17327.2c

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