Second order isothermal desorption kinetics

Y. Lilach; I. M. Danziger; M. Asscher

doi:10.1023/A:1016724025447

Second order isothermal desorption kinetics

Y. Lilach^*, I. M. Danziger, M. Asscher

^*Corresponding author for this work

Institute of Chemistry

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

10 Scopus citations

Abstract

A new method is presented to analyze recomhinative desorption from surfaces in an isothermal mode. The activation energy for desorption obtained this way is accurate as long as it is coverage independent. Second order recombinative desorption experiments of ¹⁵N₂ and D₂ from Ru(00I) were used to demonstrate this method. The activation energies were E_a(N₂) = 48 ± 2 kcal/mol and E_a(D₂) = 22 ± 1 kcal/mol for coverages below 0.1 and 0.2 of saturation coverage, respectively. Studying N/Ru(001) provides evidence for hulk nitrogen atoms that slowly diffuse to the surface leading to isotope scrambling.

Original language	English
Pages (from-to)	35-39
Number of pages	5
Journal	Catalysis Letters
Volume	76
Issue number	1-2
DOIs	https://doi.org/10.1023/A:1016724025447
State	Published - Sep 2001

Keywords

Isothermal desorption
Recombinative desorption
Second order kinetics

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title = "Second order isothermal desorption kinetics",

abstract = "A new method is presented to analyze recomhinative desorption from surfaces in an isothermal mode. The activation energy for desorption obtained this way is accurate as long as it is coverage independent. Second order recombinative desorption experiments of 15N2 and D2 from Ru(00I) were used to demonstrate this method. The activation energies were Ea(N2) = 48 ± 2 kcal/mol and Ea(D2) = 22 ± 1 kcal/mol for coverages below 0.1 and 0.2 of saturation coverage, respectively. Studying N/Ru(001) provides evidence for hulk nitrogen atoms that slowly diffuse to the surface leading to isotope scrambling.",

keywords = "Isothermal desorption, Recombinative desorption, Second order kinetics",

author = "Y. Lilach and Danziger, {I. M.} and M. Asscher",

year = "2001",

month = sep,

doi = "10.1023/A:1016724025447",

language = "אנגלית",

volume = "76",

pages = "35--39",

journal = "Catalysis Letters",

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T1 - Second order isothermal desorption kinetics

AU - Lilach, Y.

AU - Danziger, I. M.

AU - Asscher, M.

PY - 2001/9

Y1 - 2001/9

N2 - A new method is presented to analyze recomhinative desorption from surfaces in an isothermal mode. The activation energy for desorption obtained this way is accurate as long as it is coverage independent. Second order recombinative desorption experiments of 15N2 and D2 from Ru(00I) were used to demonstrate this method. The activation energies were Ea(N2) = 48 ± 2 kcal/mol and Ea(D2) = 22 ± 1 kcal/mol for coverages below 0.1 and 0.2 of saturation coverage, respectively. Studying N/Ru(001) provides evidence for hulk nitrogen atoms that slowly diffuse to the surface leading to isotope scrambling.

AB - A new method is presented to analyze recomhinative desorption from surfaces in an isothermal mode. The activation energy for desorption obtained this way is accurate as long as it is coverage independent. Second order recombinative desorption experiments of 15N2 and D2 from Ru(00I) were used to demonstrate this method. The activation energies were Ea(N2) = 48 ± 2 kcal/mol and Ea(D2) = 22 ± 1 kcal/mol for coverages below 0.1 and 0.2 of saturation coverage, respectively. Studying N/Ru(001) provides evidence for hulk nitrogen atoms that slowly diffuse to the surface leading to isotope scrambling.

KW - Isothermal desorption

KW - Recombinative desorption

KW - Second order kinetics

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SN - 1011-372X

VL - 76

SP - 35

EP - 39

JO - Catalysis Letters

JF - Catalysis Letters

IS - 1-2

ER -

Second order isothermal desorption kinetics

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Keywords

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