Adsorption/Desorption of Hydrogen on Pt Nanoelectrodes: Evidence of Surface Diffusion and Spillover

2009 ◽  
Vol 131 (41) ◽  
pp. 14756-14760 ◽  
Author(s):  
Dongping Zhan ◽  
Jeyavel Velmurugan ◽  
Michael V. Mirkin
Keyword(s):  
Surface Diffusion ◽  
Adsorption Desorption

Effect of Surface Diffusion on Adsorption–Desorption and Catalytic Kinetics in Irregular Pores. II. Macro-Kinetics

2017 ◽  
Vol 121 (27) ◽  
pp. 14557-14565 ◽  
Author(s):  
Aldo Ledesma-Durán ◽  
Saúl Iván Hernández ◽  
Iván Santamaría-Holek
Keyword(s):  
Surface Diffusion ◽  
Catalytic Kinetics ◽  
Adsorption Desorption ◽  
Effect Of Surface

Adsorption, desorption, and surface diffusion kinetics of NH3 on MgO(100)

1991 ◽  
Vol 95 (11) ◽  
pp. 8521-8531 ◽  
Author(s):  
D. A. Arthur ◽  
D. L. Meixner ◽  
M. Boudart ◽  
S. M. George
Keyword(s):  
Surface Diffusion ◽  
Diffusion Kinetics ◽  
Adsorption Desorption ◽  
Kinetics Of

ADSORPTION-INDUCED SURFACE RECONSTRUCTION PROCESSES: THE INFLUENCE ON THE ADSORPTION–DESORPTION KINETICS AND THE MOBILITY OF ADSORBED ATOMS

1999 ◽  
Vol 06 (03n04) ◽  
pp. 323-340 ◽  
Author(s):  
F. NIETO ◽  
A. A. TARASENKO ◽  
V. PEREYRA ◽  
C. UEBING
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Surface Diffusion ◽  
Surface Reconstruction ◽  
Diffusion Coefficients ◽  
Lattice Gas ◽  
Kinetic Monte Carlo ◽  
Desorption Kinetics ◽  
Disorder Phase Transition ◽  
Adsorption Desorption

In this paper we study the influence of adsorption-induced surface reconstruction on both the adsorption–desorption kinetics and the surface diffusion of adsorbed particles. The reconstruction is regarded as an order–disorder phase transition, which is described in the framework of the lattice gas formalism by the two-position (2P) model. Adsorption is studied by kinetic Monte Carlo simulations while surface diffusion coefficients are evaluated by using the classical Monte Carlo modeling. Utilizing Monte Carlo simulations we characterize how the behavior of the chemical (D), the jump (DJ) and the tracer (D*) diffusion coefficients depend on the different ordered phases predicted by the model.

A theory of contamination in electron microscopes by surface diffusion

1978 ◽  
Vol 36 (1) ◽  
pp. 116-117
Author(s):  
J.T. Fourie
Keyword(s):  
Electron Beam ◽  
Surface Diffusion ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Physical Parameters ◽  
Carbon Compounds ◽  
Hydrocarbon Molecules ◽  
Electron Microscopes ◽  
Primary Electrons ◽  
Long Chain

Contamination in electron microscopes can be a serious problem in STEM or in situations where a number of high resolution micrographs are required of the same area in TEM. In modern instruments the environment around the specimen can be made free of the hydrocarbon molecules, which are responsible for contamination, by means of either ultra-high vacuum or cryo-pumping techniques. However, these techniques are not effective against hydrocarbon molecules adsorbed on the specimen surface before or during its introduction into the microscope. The present paper is concerned with a theory of how certain physical parameters can influence the surface diffusion of these adsorbed molecules into the electron beam where they are deposited in the form of long chain carbon compounds by interaction with the primary electrons.

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