Reaction of coadsorbed nitric oxide and nitrogen atoms on Rh(111)

Journal Article · Fri Dec 01 04:00:00 EST 1995 · Journal of Catalysis

DOI:https://doi.org/10.1006/jcat.1995.1320· OSTI ID:224025

Belton, D N; DiMaggio, C L; Schmieg, S J ^[1]

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1. General Motors Research and Development Center, Warren, MI (United States); and others

The authors have studied the reaction of nitrogen atoms (N) with nitric oxide molecules (NO) coadsorbed on a Rh(111) catalyst in order to isolate the reaction of these two species as an elementary step (e.g., in the NO + CO reaction mechanism) and determine the products of that reaction. Electron beam dissociation of adsorbed NO was used to cleanly prepare N atom coverages between 0.05 and 0.5 monolayers. By using isotopically labeled NO and N reactants, the authors determined that NO and N react to form only N{sub 2}O. In contrast to previous reports, the authors see no evidence that suggests that NO and N can react to form N{sub 2} as a product. In complementary experiments, the authors have completed computer modeling of an NO temperature-programmed desorption experiment. These simulations show that NO dissociation rates in the high NO coverage limit are as much as 500 times slower than previously reported dissociation in the low coverage limit. 30 refs., 9 figs., 1 tab.

• OSTI ID: 224025
• Journal Information: Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 2 Vol. 157; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
33 ADVANCED PROPULSION SYSTEMS
40 CHEMISTRY
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COMPUTERIZED SIMULATION
DESORPTION
ELECTRON BEAMS
MILLER INDICES
NITRIC OXIDE
NITROGEN
RHODIUM