skip to main content

Title: Kinetic analysis of interaction between N atoms and O-covered Ru(0001)

Eley-Rideal (ER) reactions involving neutral atoms heavier than hydrogen reacting with adsorbed atoms of similar mass were first observed in recent molecular beam experiments by Zaharia et al. [Phys. Rev. Lett. 113, 053201 (2014)]. Through analysis of two types of measurements, they obtained different estimations for the N–O ER reaction cross section, one of which is unexpectedly high. This was qualitatively accounted for by invoking a secondary effect whereby the presence of N adatoms on the surface acted to “shield” O adatoms from prompt recombinative desorption. We apply a rate equation model that includes two ER processes involving different adsorbed species (N–O{sub ad} and N–N{sub ad}) and an N-adsorption process to the full-beam exposure subset of the experimental data in order to study the reaction kinetics. Values for the individual reaction cross sections are derived. The measured N{sub 2} response can be well described by the model, but it is insufficient to completely describe the NO response. Modeling of different exposures is used to evaluate the qualitative picture presented by Zaharia et al.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [4]
  1. Center of Interface Dynamics for Sustainability, China Academy of Engineering Physics, Chengdu, Sichuan 610200 (China)
  2. (China)
  3. (Dutch Institute For Fundamental Energy Research), P.O. Box 6336, 5600 HH Eindhoven (Netherlands)
  4. FOM Institute DIFFER (Dutch Institute For Fundamental Energy Research), P.O. Box 6336, 5600 HH Eindhoven (Netherlands)
Publication Date:
OSTI Identifier:
22493178
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 143; Journal Issue: 16; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ADSORPTION; ATOMS; CROSS SECTIONS; DESORPTION; EXPERIMENTAL DATA; HYDROGEN; INTERACTIONS; MOLECULAR BEAMS; NITRIC OXIDE; REACTION KINETICS; SIMULATION; SURFACES