Adsorption at the mercury electrode in relation to micelle and mixed micelle formation. Case of electroreducible phenoxyalkyl sulfates and SDS

Adsorption of sodium dodecyl sulfate on the bismuth (111), (001) and planes

“…Electrolytic hydrogen was bubbled for 1-2 h through the electrolyte before the submersion of the electrode into the solution, and the temperature was kept at 298 ± 0.1 K. SDS was purified according to Refs. [15][16][17][18][19][20].…”

“…in the real monomer solutions as well as in concentrated SDS solutions, where micelle formation is possible (the critical micelle formation concentration is $8 · 10 À3 M in an aqueous solution and somewhat lower ($8 · 10 À4 M) in the base electrolyte Na 2 SO 4 aqueous solution) [13][14][15][16][17][18][19][20]. Thus, solutions with concentrations of SDS greater than 8 · 10 À3 M are mixtures of micelles and monomers of SDS.…”

“…Adsorption of SDS and dodecyltrimethylammonium bromides at the Hg and Au(1 1 1) electrodes was studied [13][14][15][16][17][18][19][20] and the additional small peaks were observed near the zero charge potential in the C, E curves, explained with the so-called reorganisation process of the adsorption layer (micelle formation, two-dimensional association). In the region of adsorption-desorption peaks for Hg and Au(1 1 1) a very complicated kinetic dependence of differential capacitance on ac frequency was established, explained by deviation of the HgjSDS system from the purely diffusion and adsorption limited kinetics [13,17].…”

“…The main aim of this work was to establish the nature of the limiting stage and to obtain the adsorption parameters of sodium dodecyl sulfate at the Bi(1 1 1), Bi(0 0 1) and Bið0 1 1Þ planes and to compare the obtained information with the corresponding data for Hg and Au(1 1 1) electrodes [10,[13][14][15][16][17][18]20]. …”

Reversible and Irreversible Adsorption of Surfactants at a Hanging Mercury Drop Electrode

“…5 Adsorption at the mercury electrode in relation to micelle and mixed micelle formation was studied. 6 Many studies of the adsorption of organic compounds on mercury electrodes have been reported and thermodynamic methods of adsorption data of organic compounds were described. 7 In these studies, usually the differential capacity-potential curves have been measured to investigate the adsorption phenomena of organic compounds.…”