On the co-adsorption process of sodium dodecyl sulfate and sodium dodecylbenzenesulfonate on a 1-decanethiol-functionalized Au electrode, as a corrosion inhibiting mimic process |
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Authors: | Claudio Fontanesi Giulio Camurri Francesco Tassinari |
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Affiliation: | 1. Department of Chemistry and Geology, University of Modena and Reggio Emilia, Modena, Italy 2. LAMP S. Prospero SPA, Via della pace, 25/A, 41030, S. Prospero S/S, Modena, Italy
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Abstract: | The co-adsorption of sodium dodecyl sulfate (SDS) and sodium dodecylbenzenesulfonate (SDBS), on the 1-decanethiol self-assembled monolayer (SAM)-functionalized polycrystalline gold surface, is investigated by electrochemical techniques. The peak current (cyclic voltammetry) and charge transfer resistance (impedance spectra) variations are measured, concerning the [Fe(CN)6]3?/[Fe(CN)6]4? couple redox process. SDBS is found to yield a more efficient inhibiting barrier (towards the charge transfer process), when compared to the SDS one. Thus, it is suggesting that a higher tendency of SDBS to be co-adsorbed within the 1-decanethiol SAM with respect to SDS. |
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