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Nitrogen Scattering at Ru(0001) Surfaces
-
Teodor Zaharia
und
Michael A. Gleeson
Veröffentlicht/Copyright:
19. August 2013
Abstract
Results on the scattering of hyperthermal N2 molecules from bare and N-covered Ru(0001) surfaces are presented. These are compared with Ar scattering from the same surfaces as a reference non-reactive system. In the case of bare Ru(0001) the measured angular distributions are consistent with scattering from an atomically smooth surface after interaction with a repulsive potential energy surface. Broadening of the N2 angular intensity distribution at high incident energy, which was observed in molecular beam studies, is not apparent in our measurements. This is attributed to the broadening effect being the result of a transient trapping process that is confined to a relatively narrow incident energy range. The presence of N-adatoms on the surface results in atomic-scale surface roughening and blocking of dissociation pathways. Formation of N2 molecules as a result of abstraction of N-adatoms by incident N-atoms in an Eley–Rideal-type reaction is considered. Support for such a process is derived from comparison of the trends in the angular energy distributions of N2 and Ar.
Keywords: Hyperthermal; Molecular Beam; Surface Scattering; Corrugation; Eley–Rideal Reaction; Energy Transfer
Received: 2013-3-15
Published Online: 2013-8-19
Published in Print: 2013-11-1
© 2013 by Walter de Gruyter Berlin Boston
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Schlagwörter für diesen Artikel
Hyperthermal;
Molecular Beam;
Surface Scattering;
Corrugation;
Eley–Rideal Reaction;
Energy Transfer
Artikel in diesem Heft
- Masthead
- Masthead
- Editorial
- Milestones in Physical Chemistry (I) – A Special Issue Honoring the Seminal Work of Henry Eyring and Michael Polanyi
- International Collaborations are nothing new... and sometimes they are simply amazing
- Personal Perspective
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- Feature Article
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- Experimental and Theoretical Studies of Roaming Dynamics in the Unimolecular Dissociation of CH3NO2 to CH3O + NO
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- The Decomposition of Hydrazine in the Gas Phase and over an Iridium Catalyst
- A Theoretical Study of the X-Abstraction Reactions (X = H, Br, or I) from CH2IBr by OH Radicals: Implications for Atmospheric Chemistry
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- Chemical Reactions at Surfaces
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