Adsorption-desorption kinetics with multiple site occupation

S. Manzi, G. Costanza, V.D. Pere, ra.

Abstract


The adsorption-desorption kinetics with multiple site occupation in a one-dimensional network is formulated in the framework of the kinetic lattice gas model. The kinetic equations that describe the time evolution of the correlators are obtained by use of the so called Local Evolution Rules, that take into account the adsorption, desorption, and diffusion of the adsorbed molecules. After truncating the infinite hierarchy of equations, different cases are analyzed. Equilibrium solutions are obtained and the exact expression for adsorption isotherms as well as the nearest-neighbor correlations are presented. The asymptotic approach to the equilibrium is also discussed. Finally, we analyzed the desorption kinetics throughout the thermal desorption spectra.

Keywords


Models of surface kinetics; adsorption kinetics; surface diffusion; termal desorption spectroscopy

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REVISTA MEXICANA DE FÍSICA, year 67, issue 2, March-April 2021. Bimonthly Journal published by Sociedad Mexicana de Física, A. C. Departamento de Física, 2º Piso, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Alcaldía Coyacán, C.P. 04510 , Ciudad de México. Apartado Postal 70-348. Tel. (+52)55-5622-4946, https://rmf.smf.mx/ojs/rmf, e-mail: rmf@ciencias.unam.mx. Chief Editor: José Alejandro Ayala Mercado. INDAUTOR Certificate of Reserve: 04-2019-080216404400-203, ISSN: 2683-2224 (on line), 0035-001X (print), both granted by Instituto Nacional del Derecho de Autor. Responsible for the last update of this issue, Technical Staff of Sociedad Mexicana de Física, A. C., Fís. Efraín Garrido Román, 2º. Piso, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Alcaldía Coyacán, C.P. 04510 , Ciudad de México. Date of last modification, March 1st., 2021.

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