Abstract
The catalytic removal of NH and NH2 free radicals by polycrystalline Pt and Fe has been studied as a function of catalyst temperature by using the laser-induced fluorescence (LIF) technique. Activation energies for removal of NH and NH2 by Pt and Fe have been determined. On Pt, NH2 and NH show a surface poisoning effect due to the accumulation of decomposition products on the surface. NH was found to desorb from Pt at T > 1200 K and from Fe at T > 1000 K from the metal-catalyzed decomposition of NH3. Desorption of NH has also been observed from the reaction of N2 + H2 on Fe at T > 1000 K. No evidence for NH2 desorption from Pt or Fe was found at all temperatures studied.
Original language | English |
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Pages (from-to) | 760-765 |
Number of pages | 6 |
Journal | Journal of physical chemistry |
Volume | 86 |
Issue number | 5 |
DOIs | |
State | Published - 1 Dec 1982 |