An intermittent temperature-programmed desorption method for studying kinetics of desorption from heterogeneous surfaces

2004 ◽  
Vol 238 (1-4) ◽  
pp. 91-96 ◽  
Author(s):  
F. Gaillard ◽  
M. Abdat ◽  
J.P. Joly ◽  
A. Perrard
Keyword(s):  
Temperature Programmed Desorption ◽  
Heterogeneous Surfaces ◽  
Temperature Programmed ◽  
Kinetics Of ◽  
Desorption Method

Investigation of Oxygen Interaction with a Pt−Rh/Al2O3Catalyst by a Differential Temperature-Programmed Desorption Method

Langmuir ◽  
2003 ◽  
Vol 19 (22) ◽  
pp. 9266-9270 ◽  
Author(s):  
J. J. Lecomte ◽  
S. Haydar ◽  
P. Granger ◽  
L. Leclercq ◽  
G. Leclercq ◽  
...  
Keyword(s):  
Temperature Programmed Desorption ◽  
Temperature Programmed ◽  
Desorption Method ◽  
Oxygen Interaction

Adsorption of Silicon Tetrachloride on Si(111) 7×7

1988 ◽  
Vol 131 ◽  
Author(s):  
P. Gupta ◽  
P. A. Coon ◽  
B. G. Koehler ◽  
S. M. George
Keyword(s):  
Surface Temperature ◽  
Thermal Desorption ◽  
Temperature Programmed Desorption ◽  
Silicon Tetrachloride ◽  
Sticking Coefficient ◽  
Adsorption Model ◽  
Temperature Programmed ◽  
Kinetics Of

ABSTRACTThe kinetics of SiCl4 adsorption on Si(lll) 7×7 were studied using laser induced thermal desorption (LITD) and temperature programmed desorption (TPD) techniques. The initial reactive sticking coefficient of SiCl4 on Si(lll) 7×7 was observed to decrease with increasing surface temperature. This decrease was consistent with a precursor-mediated adsorption model. Both LITD and TPD experiments monitored SiCl2 as the main desorption product. These results suggest that SiC12 may be the stable chlorine species on the Si(lll) 7×7 surface.

scholarly journals Engineering of TMDC-OSC Hybrid Interfaces: The Thermodynamics of Unitary and Mixed Acene Monolayers on MoS2

2020 ◽  
Author(s):  
Stefan R. Kachel ◽  
Pierre Martin Dombrowski ◽  
Tobias Breuer ◽  
Michael Gottfried ◽  
Gregor Witte
Keyword(s):  
Monte Carlo ◽  
Molecular Mobility ◽  
Temperature Programmed Desorption ◽  
Model System ◽  
Desorption Kinetics ◽  
Temperature Programmed ◽  
Kinetics Of

Here, we use temperature-programmed desorption (TPD) and Monte Carlo (MC) simulations<br>of TPD traces to characterize the desorption kinetics of pentacene (PEN) and perfluoropentacene (PFP) on MoS2 as a model system for OSCs on TMDCs. We show that the monolayers of PEN and PFP are thermally stabilized compared to their multilayers, which allows to prepare nominal monolayers by selective desorption of multilayers. This stabilization is, however, caused by entropy due to a high molecular mobility rather than an enhanced molecule-substrate bond. Consequently, the nominal monolayers are not densely packed films.

Complex Catalysts for Direct Synthesis of Dimethyl Ether From Synthesis Gas. Part II. The Interaction of the Process Reactants and Products with the Catalyst Surfaces

2013 ◽  
Vol 872 ◽  
pp. 23-29
Author(s):  
Natalia I. Kosova ◽  
Irina A. Kurzina ◽  
Larisa N. Kurina
Keyword(s):  
Dimethyl Ether ◽  
Direct Synthesis ◽  
Temperature Programmed Desorption ◽  
Main Process ◽  
Methanol Dehydration ◽  
Mass Spectrometry Detection ◽  
Temperature Range ◽  
Temperature Programmed ◽  
Desorption Method ◽  
Synthesis Of Dimethyl Ether

The mechanism of the Н2, СО, СО2, СН3ОН, (CH3)2O interaction with the surfaces of CuO/ZnO/Al2O3and γ-Al2O3was investigated using temperature-programmed desorption method with mass spectrometry detection. It was shown that desorption of the main process components takes place in the temperature range between 373 and 673 K, which corresponds to the temperature range for catalytic studies. Methanol dehydration takes place over the surface of γ-Al2O3catalyst with formation of dimethyl ether at Тmax= 553 К, which is the optimal temperature for synthesis of dimethyl ether from CO and H2over industrial catalysts with layered loadings. The desorption energies of the gases were calculated.

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