Heterogeneous reactions between ions NH3+ and NH+ and hydrocarbons adsorbed on a tungsten surface. Formation of HCN+ in NH+-surface hydrocarbon collisions
| Autor: | Zdenek Herman, Martina Harnisch, Paul Scheier |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
FOS: Physical sciences
chemistry.chemical_element 02 engineering and technology Activation energy Surface reaction Tungsten Photochemistry 01 natural sciences Ion Adsorption Computational chemistry Physics - Atomic and Molecular Clusters Physical and Theoretical Chemistry Instrumentation Spectroscopy chemistry.chemical_classification 010401 analytical chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 3. Good health 0104 chemical sciences Hydrocarbon chemistry Yield (chemistry) Atomic and Molecular Clusters (physics.atm-clus) 0210 nano-technology No formation |
| Zdroj: | International Journal of Mass Spectrometry |
| ISSN: | 1387-3806 |
| Popis: | Interaction of NH$_3$$^{+}$ (ND$_3$$^{+}$) and NH$^{+}$ with a hydrocarbon-covered tungsten surface kept at room temperature and heated to 150{\deg}C and 300{\deg}C showed a series of reactions between the projectile ion and hydrocarbons adsorbed on the tungsten surface. Collisions with NH3+ and particularly with ND3+ showed formation of NH$_4$$^{+}$, HCNH$^{+}$, and CH$_2$NH$_2$$^{+}$ and ND$_3$H+, HCND$^{+}$, and CH$_2$ND$_2$$^{+}$, respectively, with NH$_4$$^{+}$ (ND$_3$H$^{+}$) strongly prevailing at low incident energies of the projectile ion. No formation of HCN$^{+}$ (DCN$^{+}$) could be positively identified. In reactions with NH$^{+}$ formation of HCN$^{+}$ was clearly observed; the dependence of the HCN$^{+}$ normalized ion yield on incident energy seems to indicate a threshold at about 40 eV which may be due to an activation energy or an endothermicity of the surface reaction of about 2.4-3.2 eV. Comment: 14 pages, 6 figures |
| Databáze: | OpenAIRE |
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