Adsorption of n-butanol on Pb-Ga in aqueous solutions: Effect of metal on the adsorption of organic compounds in the absence of metal-water chemisorption interactionстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The potential dependence of the differential capacitance is measured by an ac bridge at 420 Hz and 32°C at Pb-Ga/H 2O interface in 0.05 M Na 2SO 4 solutions containing n-butanol in different concentrations. Adsorption parameters for n-butanol are determined using a regression analysis and compared with those for Hg, Tl-Ga, and Bi-Ga. As follows from this comparison, though there is no chemisorption interaction between these metals and water, the energy of n-butanol adsorption at these metals depends on the metal nature. The Pb-Ga data fit a common correlation dependence of the electronic capacitance of different electrodes (C m -1) phys on the energy of the n-butanol molecules adsorption thereon in the absence of a metal-water chemisorption interaction. This finding evidences that the dependence of the energy parameters for the adsorption of organic compounds on the metals’ electronic properties, when characterized by (C m -1) phys, is of general nature.