Is it possible to use the Langmuir Isotherm in electrochemical studies? A critical view on the subject

This article undertakes a critical evaluation of the literature regarding the use of the Langmuir isotherm, specifically in the context of inhibitor research. The Langmuir isotherm is frequently employed to derive thermodynamic and kinetic parameters, which are then used to gauge inhibitor performan...

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Bibliographic Details
Published inCorrosion science Vol. 219; p. 111240
Main Authors Almeida, Tatiana C., Cunha, Jéssica N., D’Elia, Eliane, Mattos, Oscar Rosa
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 15.07.2023
Subjects
Adsorption phenomenon
Inhibitor efficiency
Langmuir isotherm
Adsorption phenomenon
Inhibitor efficiency
Langmuir isotherm
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Summary:This article undertakes a critical evaluation of the literature regarding the use of the Langmuir isotherm, specifically in the context of inhibitor research. The Langmuir isotherm is frequently employed to derive thermodynamic and kinetic parameters, which are then used to gauge inhibitor performance. However, the validity of the Langmuir isotherm has been challenged, particularly by Walczak et al. (2019), whose work has served as a basis for others to reject its use as inadequate. Imposing limitations on the Langmuir isotherm would involve restrictions on heterogeneous kinetics, impedance interpretation, and other transient techniques. These aspects will be subjected to a more in-depth analysis in this discussion paper. ●Discussion on the use of the Langmuir isotherm in electrochemical studies.●Analysis of the use of XPS as a tool for obtaining surface coverage.●Study of heterogeneous kinetics and the use of the Langmuir isotherm.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2023.111240