4.6 Article

Theoretical approach to energy levels applied to modified surfaces

期刊

PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 24, 期 20, 页码 12592-12600

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ROYAL SOC CHEMISTRY
DOI: 10.1039/d2cp00932c

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  1. Universidad Nacional de Santiago del Estero (Argentina) [CICyTUNSE 23 A212]

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The main objective of this work is to propose a new theoretical basis for describing surface deposition on a modified electrode surface. The interaction between electroactive particles and impurities is considered, and the energy levels theory (TAEL) is presented through the integral equation formalism. The adsorption isotherms and compressibility of the adsorption layer are compared with Monte Carlo simulations and the modified mean field approach (MMFA).
The main objective of this work is to present a new theoretical basis to describe surface deposition on a modified electrode surface. The surface is modified via the irreversible deposition of fixed particles or impurities that can block a fraction of the adsorption sites. An electroactive species was allowed to adsorb to the accessible sites and transfer electric charge. Energetics interactions between the electroactive particles and impurities were considered. The theoretical approach of energy levels (TAEL) was presented, through the integral equation formalism, where for its formulation the binomial distribution of energy levels and the standard Langmuir isotherm were considered. Adsorption isotherms and the compressibility of the adsorption layer were compared with Monte Carlo simulations and the recently published modified mean field approach (MMFA). Various conditions were studied: attractive and repulsive lateral interactions, and different quantities of impurities in one- and two-dimensional lattices. The performance of the theoretical approximations was analyzed by calculating an integral error.

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