In this paper a quantitative study of the adsorption of iso-C4H9CN(isovaleronitrile, IVN) at the interfaces between Hg and In-Ga alloy (eutectic composition) electrodes and aqueous solutions is described. The equilibrium charge densities at Hg electrodes were determined from both electrocapillary and impedance measurements, whereas at the In-Ga electrode only impedance data were available. The adsorption parameters for IVN, including the standard Gibbs energy of adsorption (DGads°), the lateral interaction parameter, a, and the limiting Gibbs surface excess were calculated and compared with previous data relative to the behavior of aliphatic compounds at different interfaces. The experimental results are discussed in terms of metal-solvent and metal-adsorbate interactions.
Adsorption of C-5 nitriles at liquid-metal electrodes. A comparison of adsorption parameters for isovaleronitrile at the polarized surfaces of Mercury and Indium-Gallium alloy (eutectic composition)
DE BATTISTI, Achille;
2003
Abstract
In this paper a quantitative study of the adsorption of iso-C4H9CN(isovaleronitrile, IVN) at the interfaces between Hg and In-Ga alloy (eutectic composition) electrodes and aqueous solutions is described. The equilibrium charge densities at Hg electrodes were determined from both electrocapillary and impedance measurements, whereas at the In-Ga electrode only impedance data were available. The adsorption parameters for IVN, including the standard Gibbs energy of adsorption (DGads°), the lateral interaction parameter, a, and the limiting Gibbs surface excess were calculated and compared with previous data relative to the behavior of aliphatic compounds at different interfaces. The experimental results are discussed in terms of metal-solvent and metal-adsorbate interactions.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
