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Article Dans Une Revue Contributions to Plasma Physics Année : 2011

Oxidation of NO into NO2 by surface adsorbed O atoms

Olivier Guaitella
M. Hübner
  • Fonction : Auteur
V. Guerra
  • Fonction : Auteur
C.D. Pintassilgo
  • Fonction : Auteur
S. Welzel
  • Fonction : Auteur
J. Röpcke
  • Fonction : Auteur
Antoine Rousseau

Résumé

Plasma-surface interactions are increasingly recognised as a key factor in explaining molecule production and conversion processes. In order to scrutinise such effects well-defined surface and gas phase conditions are required. Hence, the inner surface of a Pyrex tube was treated by a capacitively coupled RF plasma at low pressure. The post-plasma oxidation of gas mixtures containing 1 % NO into NO2 has been studied by means of quantum cascade laser absorption spectroscopy in the mid-infrared spectral range. The plasma pre-treatment experiments with oxygen containing precursors suggest O atom adsorption on the Pyrex tube with a surface density of 2.7 x 1014 cm–2. A simple kinetic model was developed and shows good agreement with the measured NO and NO2 gas phase concentrations. In the model a fraction of the surface is considered to be covered with chemisorption sites where atoms and molecules can be adsorbed, whereas they can be removed only by recombination (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

Dates et versions

hal-01549461 , version 1 (28-06-2017)

Identifiants

Citer

Olivier Guaitella, M. Hübner, Daniil Marinov, V. Guerra, C.D. Pintassilgo, et al.. Oxidation of NO into NO2 by surface adsorbed O atoms. Contributions to Plasma Physics, 2011, 51 (2-3), pp.176-181. ⟨10.1002/ctpp.201000068⟩. ⟨hal-01549461⟩
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