J. Sobkowski, S. Smoliński, P. Zelenay
Mar 15, 1998
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Influential Citations
6
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Journal
Colloids and Surfaces A: Physicochemical and Engineering Aspects
Abstract
Abstract The phenomenon of sulfate ion adsorption on monocrystalline silver surfaces was investigated quantitatively. The adsoprtion of sulfate from 0.1 M HClO4 was found reversible with respect to the potential and also to the bulk concentration of sulfate. The adsorption isotherms as well as the surface concentration/potential dependences were determined radiometrically. The surface concentration sequence was found to be Ag(111)2Ag(110) >Ag(100). The thermodynamic parameters of adsorption were calculated by fitting experimental data to virial, Frumkin and Henry adsorption models. The sequence of sulfate adsorption on three basal silver planes from 0.1 M NaClO4 was found to be quite different to that from an acidic supporting electrolyte, in agreement with the sequence of zero-charge potentials for the silver surfaces investigated.