INVESTIGADORES
GAVILÁN ARRIAZU Edgardo Maximiliano
artículos
Título:
Electrosorption of a modified electrode in the vicinity of phase transition: A Monte Carlo study
Autor/es:
GAVILÁN ARRIAZU, E.M.; PINTO, O.A.
Revista:
APPLIED SURFACE SCIENCE
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2018 vol. 433 p. 705 - 712
ISSN:
0169-4332
Resumen:
We present a Monte Carlo study for the electrosorption of an electroactive species on a modified electrode. The surface of the electrode is modified by the irreversible adsorption of a non-electroactive species which is able to block a percentage of the adsorption sites. This generates an electrode with variable connectivity sites. A second species, electroactive in this case, is adsorbed in surface vacancies and can interact repulsively with itself. In particular, we are interested in the analysis of the effect of the non-electroactive species near of critical regime, where the c(2 × 2) structure is formed. Lattice-gas models and Monte Carlo simulations in the Gran Canonical Ensemble are used. The analysis conducted is based on the study of voltammograms, order parameters, isotherms, configurational entropy per site, at several values of energies and coverage degrees of the non-electroactive species.
