A computerized chronocoulometric technique was employed to investigate the adsorption behavior of n-hexanol (NHEX) on the (111) face of a silver single crystal from aqueous 0.05 M KClO4. The charge density, σM, as a function of the applied potential, E, and of the NHEX concentration was analyzed thermodynamically, yielding the Gibbs surface excess and the standard Gibbs energy of adsorption, ΔG°ads, of NHEX as a function of E and σM. A comparison of the experimental adsorption parameters with a molecular model points to a flat orientation of the adsorbed NHEX molecules. The low value of -ΔG°ads at the potential of maximum adsorption, 18.4 kJ mol-1, is indicative of the strongly hydrophilicity of silver.

Adsorption behavior of n-Hexanol on Ag(111) from aqueous 0.05 M KC1O4 / M. Foresti; M. Innocenti; A. Hamelin.. - In: LANGMUIR. - ISSN 0743-7463. - STAMPA. - 11:(1995), pp. 498-505.

Adsorption behavior of n-Hexanol on Ag(111) from aqueous 0.05 M KC1O4

FORESTI, MARIA LUISA;INNOCENTI, MASSIMO;
1995

Abstract

A computerized chronocoulometric technique was employed to investigate the adsorption behavior of n-hexanol (NHEX) on the (111) face of a silver single crystal from aqueous 0.05 M KClO4. The charge density, σM, as a function of the applied potential, E, and of the NHEX concentration was analyzed thermodynamically, yielding the Gibbs surface excess and the standard Gibbs energy of adsorption, ΔG°ads, of NHEX as a function of E and σM. A comparison of the experimental adsorption parameters with a molecular model points to a flat orientation of the adsorbed NHEX molecules. The low value of -ΔG°ads at the potential of maximum adsorption, 18.4 kJ mol-1, is indicative of the strongly hydrophilicity of silver.
1995
11
498
505
M. Foresti; M. Innocenti; A. Hamelin.
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/319897
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