Interaction of hydrogen and nitrogen on polycrystalline iron films at low pressures and at low temperatures
Journal Article
·
· J. Catal.; (United States)
The interaction of H/sub 2/ and N/sub 2/ on extremely clean iron films was investigated by mass spectrometric measurements of displacement, thermal desorption, isotopic equilibration, and by measurements of electrical resistance. The adsorption of N/sub 2/ on iron films partially covered with H/sub 2/, the adsorption of H/sub 2/ on iron films partially covered with N/sub 2/, and the alternating adsorption of N/sub 2/ and H/sub 2/ were studied. The results were obtained in the temperature range from 77 to 400/sup 0/K and at pressures up to 5 x 10/sup -4/ Torr. Nitrogen does not displace hydrogen from the iron surface; it is physisorbed on a monolayer of chemisorbed hydrogen. Hydrogen displaces nitrogen from the iron surface. The kinetics of these reactions are discussed. It was found that the isotopic equilibrium between /sup 14/N/sub 2/ and /sup 16/N/sub 2/ was not established even when nitrogen was adsorbed on iron in the presence of hydrogen. Thermal desorption studies produced no evidence for the formation of N--H adducts.
- Research Organization:
- Universitaet Erlangen-Nuernberg, Erlangen, Ger.
- OSTI ID:
- 7327338
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 44:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
090320* -- Inorganic Hydrogen Compound Fuels-- Preparation-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400203 -- Isotope Exchange & Isotope Separation-- (-1987)
CATALYTIC EFFECTS
CHEMICAL REACTIONS
CRYOGENIC FLUIDS
ELEMENTS
FILMS
FLUIDS
HYDROGEN
IRON
ISOTOPES
ISOTOPIC EXCHANGE
LIGHT NUCLEI
LOW TEMPERATURE
MEDIUM TEMPERATURE
METALS
NITROGEN
NITROGEN 14
NITROGEN 15
NITROGEN ISOTOPES
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
STABLE ISOTOPES
TRANSITION ELEMENTS
VERY LOW TEMPERATURE
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400203 -- Isotope Exchange & Isotope Separation-- (-1987)
CATALYTIC EFFECTS
CHEMICAL REACTIONS
CRYOGENIC FLUIDS
ELEMENTS
FILMS
FLUIDS
HYDROGEN
IRON
ISOTOPES
ISOTOPIC EXCHANGE
LIGHT NUCLEI
LOW TEMPERATURE
MEDIUM TEMPERATURE
METALS
NITROGEN
NITROGEN 14
NITROGEN 15
NITROGEN ISOTOPES
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
STABLE ISOTOPES
TRANSITION ELEMENTS
VERY LOW TEMPERATURE