Results for pyridine (Py) adsorption on columnar-structured (cs) gold substrates from acid solutions at different potentials and 298 K are compared to the predictions of a recently proposed Langmuirian adsorption model at columnar surfaces. The difference in the apparent adsorption Gibbs energy derived from the adsorption isotherm of Py on cs- and smooth gold substrates was accounted for by a correction factor (f) that depends on the roughness (R) of the substrate according to f∝R−n, as expected from Monte Carlo simulation of the model. This agreement indicates that the substrate geometry plays a key role in the interpretation of adsorption isotherms.
Información general
Fecha de publicación:1999
Idioma del documento:Inglés
Revista:Journal of Electroanalytical Chemistry; vol. 474
Institución de origen:Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
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