scholarly journals Analysis of Thermal Desorption Curves for Heterogeneous Surfaces. I. A Linear Variation of the Activation Energy of Desorption

1978 ◽  
Vol 51 (1) ◽  
pp. 85-89 ◽  
Author(s):  
Yasuo Tokoro ◽  
Makoto Misono ◽  
Toshio Uchijima ◽  
Yukio Yoneda
Keyword(s):  
Activation Energy ◽  
Thermal Desorption ◽  
Linear Variation ◽  
Heterogeneous Surfaces ◽  
Activation Energy Of Desorption

A Mass Spectrometric Investigation of the Thermal Desorption of Atmospheric Gases from Plutonium Dioxide. I. Radiolytically Produced Nitric Oxide

1971 ◽  
Vol 25 (1) ◽  
pp. 70-76 ◽  
Author(s):  
Jerry L. Stakebake ◽  
Robert W. Loser ◽  
Carey A. Chambers
Keyword(s):  
Nitric Oxide ◽  
Thermal Desorption ◽  
Probable Mechanism ◽  
Spectrometric Investigation ◽  
Atmospheric Gases ◽  
Mass Spectrometric Investigation ◽  
Kcal Mole ◽  
Plutonium Dioxide ◽  
Adsorbed Gas ◽  
Activation Energy Of Desorption

A technique is developed for measuring the thermal desorption of one or more gases using the time-of-flight mass spectrometer. With this method the adsorbed population, gas-solid bond energy, and preexponential kinetic factor can be determined for each adsorbed gas. The thermal desorption of nitric oxide from plutonium dioxide was measured over the temperature range 100°–900°C and typical spectra are presented. The activation energy of desorption was found to be 19.4 kcal/mole. The probable mechanism for adsorption is also discussed.

Characterization of energetic topography of heterogeneous surfaces through the analysis of thermal desorption spectra

2002 ◽  
Vol 501 (3) ◽  
pp. 282-292 ◽  
Author(s):  
M.V. Gargiulo ◽  
J.L. Sales ◽  
M. Ciacera ◽  
G. Zgrablich
Keyword(s):  
Thermal Desorption ◽  
Heterogeneous Surfaces

A New Method to Determine the Activation Energy for Hydrogen Desorption from Steels

2005 ◽  
Vol 475-479 ◽  
pp. 229-232
Author(s):  
Fu Gao Wei ◽  
Kaneaki Tsuzaki ◽  
Toru Hara
Keyword(s):  
Activation Energy ◽  
Thermal Desorption ◽  
Precise Measurement ◽  
Hydrogen Desorption ◽  
New Method ◽  
Thermal Desorption Spectrum ◽  
Thermal Desorption Spectrometry ◽  
Desorption Spectrum ◽  
Tic Particle ◽  
Best Fit

A new method has been developed to determine the activation energy for hydrogen desorption from steels by means of thermal desorption spectrometry (TDS). This method directly fits the Kissinger’s reaction kinetic formula dX/dt=A(1-X)exp(-Ed/RT) to experimentally measured thermal desorption spectrum and best fit yields the activation energy (Ed) and the value of constant A. It has been proven that this new method is applicable to precise measurement of the activation energy for hydrogen desorption from incoherent TiC particle, coherent TiC precipitate, grain boundary and dislocation in 0.05C-0.20Ti-2.0Ni and 0.42C-0.30Ti steels.

Thermal desorption from heterogeneous surfaces; normalized curve treatment

1984 ◽  
Vol 137 (2-3) ◽  
pp. A61
Author(s):  
Pio Forzatti ◽  
Massimo Borghesi ◽  
Italo Pasquon ◽  
Enrico Tronconi
Keyword(s):  
Thermal Desorption ◽  
Heterogeneous Surfaces

Analysis of Thermal Desorption Spectra of Heterogeneous Surfaces†

Langmuir ◽  
1999 ◽  
Vol 15 (18) ◽  
pp. 6070-6082 ◽  
Author(s):  
Yu. K. Tovbin ◽  
E. V. Votyakov
Keyword(s):  
Thermal Desorption ◽  
Heterogeneous Surfaces

Application of temperature-programmed desorption to surfaces with physically adsorbed species

1968 ◽  
Vol 46 (6) ◽  
pp. 1033-1036 ◽  
Author(s):  
H. P. Schreiber ◽  
A. G. MacKinnon
Keyword(s):  
Activation Energy ◽  
Acetic Acid ◽  
Chain Length ◽  
High Stability ◽  
Temperature Programmed Desorption ◽  
Adsorbed Species ◽  
Pigment Surface ◽  
Temperature Programmed ◽  
Activation Energy Of Desorption ◽  
Very High

Temperature-programmed desorption has been applied to physisorbed aliphatic alcohols and acids on a rutile pigment surface. Reproducible desorption chromatograms for a series of alcohol adsorbates indicate that the same sites are involved in adsorbing the series and that the adsorbate orientation from the surface deviates progressively from normal as the chain length increases. The data also infer a reduction in the activation energy of desorption with increasing chain length. Acid adsorbates also generate reproducible chromatograms, those for formic and acetic acid showing characteristic peaks near 300 °C. The reason for the very high stability of these adsorbates has not yet been resolved.

scholarly journals Образование и стабильность поверхностных химических соединений при взаимодействии бериллия с поверхностью (101 0) Re

2022 ◽  
Vol 64 (1) ◽  
pp. 134
Author(s):  
Е.В. Рутьков ◽  
Н.Р. Галль
Keyword(s):  
Activation Energy ◽  
Thermal Desorption ◽  
Multilayer Film ◽  
Chemical Compounds ◽  
Specific Adsorption ◽  
Surface Chemical ◽  
Temperature Range

It is shown that the adsorption of Be on Re (1010) in the temperature range of 850-950 K leads to the formation of specific adsorption states - surface chemical compounds (SC) of ReBe stoichiometry with a concentration of adsorbed Be atoms of ~ 1.4 • 1015 cm-2. A multilayer film of beryllium (3-4 layers) is destroyed upon heating, and at 900 K all Be atoms leave the surface into the bulk of rhenium, except those that are part of the SC; atoms from the SC, in turn, actively dissolve at T> 1050-1150 K. This corresponds to a decrease in the activation energy of dissolution upon the formation of SC from about 3.3 to 2.7 eV. Thermal desorption of beryllium takes place only at T> 2100 K due to the emergence of Be atoms dissolved in the bulk of the metal onto the surface.

Thermal desorption from heterogeneous surfaces; normalized curve treatment

1984 ◽  
Vol 137 (2-3) ◽  
pp. 595-606 ◽  
Author(s):  
Pio Forzatti ◽  
Massimo Borghesi ◽  
Italo Pasquon ◽  
Enrico Tronconi
Keyword(s):  
Thermal Desorption ◽  
Heterogeneous Surfaces
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