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Kinetic parameters obtained from area integration of single peak thermal desorption spectra (1990)

Cabrera, A. L.

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 93 (1990), S. 2854-2858

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ISSN: 1089-7690

Source: AIP Digital Archive

Topics: Physics , Chemistry and Pharmacology

Notes: This paper presents a method to analyze thermal desorption spectra based on area integration of the desorption peaks. An expression is derived for the rate of desorption in a thermal-activated process which permits evaluation of the rate from the intensity and area values for each point of the curve. Arrhenius plots of the rate data yield the activation energy and attempt frequency for desorption. The order of the desorption process is determined from the best linear fit in the Arrhenius plots. Included are applications for analyzing thermal desorption spectra obtained with a thermal conductivity detector or a mass spectrometer. Analyses of NO desorption from KNbO3 and H2 desorption from Ni surfaces illustrate the method.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.458870

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