Heterogenní reakce mezi ionty dusíku a uhlovodíky adsorbovanými na povrchu pevných látek

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  • Z. Herman Laboratoř V. Čermáka, Ústav fyzikální chemie Jaroslava Heyrovského, Akademie věd České republiky, v.v.i., Praha, Česká republika | Institute for Ion Physics and Applied Physics, University of Innsbruck, Innsbruck, Rakousko
  • M. Harnisch Institute for Ion Physics and Applied Physics, University of Innsbruck, Innsbruck, Rakousko
  • L. Ballauf Institute for Ion Physics and Applied Physics, University of Innsbruck, Innsbruck, Rakousko
  • P. Scheier Institute for Ion Physics and Applied Physics, University of Innsbruck, Innsbruck, Rakousko

Klíčová slova:

heterogenní reakce, ionty dusíku, povrchy uhlovodíků, tvorba HCN⁺

Abstrakt

Formation of HCN+ in heterogeneous reactions between gas phase ions N+, N2+, and NH+ with hydrocarbons adsorbed on conducting substrates (tungsten, beryllium, carbon) was investigated at room temperature, and at elevated temperatures of 150 °C and 300 °C of the surface. The incident energy range of the ions was 20–100 eV. The reaction with N+ was observed at all incident energies and it may be expected to occur even down to thermal energies, though this extrapolation is tentative and not confirmed by experiments. The reaction with N2+ was observed only at incident energies above about 60 eV, and the reaction with NH+ at incident energies above about 40 eV, indicating an endothermicity or an activation barrier of about 3–3.5 eV (N2+) or 2.8–3.2 eV (NH+). Only the reaction with N+ may thus be of a possible relevance to astrophysics and the upper atmosphere of Titan.

Publikováno

15.10.2018

Jak citovat

Herman, Z., Harnisch, M., Ballauf, L., & Scheier, P. (2018). Heterogenní reakce mezi ionty dusíku a uhlovodíky adsorbovanými na povrchu pevných látek. Chemické Listy, 112(10), 701–707. Získáno z http://chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/3195

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