Catalytic removal of NH and NH2 free radicals by polycrystalline Pt and Fe surfaces

G. S. Selwyn; G. T. Fujimoto; Ming-Chang Lin

doi:10.1021/j100394a035

Catalytic removal of NH and NH₂ free radicals by polycrystalline Pt and Fe surfaces

G. S. Selwyn
, G. T. Fujimoto
, Ming-Chang Lin^*

^*Corresponding author for this work

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

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
Pages (from-to)	760-765
Number of pages	6
Journal	Journal of physical chemistry
Volume	86
Issue number	5
DOIs	https://doi.org/10.1021/j100394a035
State	Published - 1 Dec 1982

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title = "Catalytic removal of NH and NH2 free radicals by polycrystalline Pt and Fe surfaces",

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.",

author = "Selwyn, \{G. S.\} and Fujimoto, \{G. T.\} and Ming-Chang Lin",

year = "1982",

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doi = "10.1021/j100394a035",

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journal = "Journal of physical chemistry",

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T1 - Catalytic removal of NH and NH2 free radicals by polycrystalline Pt and Fe surfaces

AU - Selwyn, G. S.

AU - Fujimoto, G. T.

AU - Lin, Ming-Chang

PY - 1982/12/1

Y1 - 1982/12/1

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/0000526244

U2 - 10.1021/j100394a035

DO - 10.1021/j100394a035

M3 - Article

AN - SCOPUS:0000526244

SN - 0022-3654

VL - 86

SP - 760

EP - 765

JO - Journal of physical chemistry

JF - Journal of physical chemistry

IS - 5

ER -

Catalytic removal of NH and NH₂ free radicals by polycrystalline Pt and Fe surfaces

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