| Numéro |
J. Phys. Colloques
Volume 47, Numéro C7, Novembre 1986
33rd International Field Emission Symposium / 33ème Symposium International d'Emission de Champ
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| Page(s) | C7-413 - C7-418 | |
| DOI | https://doi.org/10.1051/jphyscol:1986769 | |
33rd International Field Emission Symposium / 33ème Symposium International d'Emission de Champ
J. Phys. Colloques 47 (1986) C7-413-C7-418
DOI: 10.1051/jphyscol:1986769
1 Visiting scientist from Dalian Institute of Chemical Physics. The Chinese Academy of Sciences. Dalian. P.R. of China
2 Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-1000 Berlin 33, F.R.G.
3 Visiting scientist from Nagoya Institute of Technology, Gokiso-cho Showa-ku. Nagoya 466, Japan
J. Phys. Colloques 47 (1986) C7-413-C7-418
DOI: 10.1051/jphyscol:1986769
INTERACTION OF H2 AND N2 ON Fe, INVESTIGATED BY PULSED LASER ATOM PROBE
Y. LI1, W. DRACHSEL2, J.H. BLOCK2 et F. OKUYAMA31 Visiting scientist from Dalian Institute of Chemical Physics. The Chinese Academy of Sciences. Dalian. P.R. of China
2 Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-1000 Berlin 33, F.R.G.
3 Visiting scientist from Nagoya Institute of Technology, Gokiso-cho Showa-ku. Nagoya 466, Japan
Abstract
The interaction of hydrogen and nitrogen has been studied on iron field emitters at low temperatures (T<300 K) and low pressures (p<10-4 Torr). It is shown from thermodynamics that chemical equilibrium permits NH3 -formation at these temperatures. However, intermediates or products of such a reaction could not be observed on iron contrary to the literature data on Pt. The iron surface is extremely sensitive to traces of H2O and undergoes field enhanced oxidation processes. Field enhanced nitrogen adsorption leads to a depletion of hydrogen in the adsorption layer.