Investigation of Hexylamine Adsorption on Gold in Perchloric Acid
The adsorption of hexylamine at the solution–gold interface in 1 M HClO<sub>4</sub> in the presence of 0.1 M Fe<sup>2+</sup> and 0.1 Fe<sup>3+</sup> was studied by potentiodynamic, chronoamperometric and EIS methods. The main kinetic characteristics of the oxidati...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/13/5070 |
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| author | Gennady I. Ostapenko Nina A. Kalashnikova |
| author_facet | Gennady I. Ostapenko Nina A. Kalashnikova |
| author_sort | Gennady I. Ostapenko |
| collection | DOAJ |
| description | The adsorption of hexylamine at the solution–gold interface in 1 M HClO<sub>4</sub> in the presence of 0.1 M Fe<sup>2+</sup> and 0.1 Fe<sup>3+</sup> was studied by potentiodynamic, chronoamperometric and EIS methods. The main kinetic characteristics of the oxidation-reduction reaction iron ions (exchange current density, transfer coefficient, diffusion coefficients of iron ions) were determined. It was shown that the physical adsorption of hexylamine on gold can be described by the Dhar–Flory–Huggins isotherm. The values of the adsorption constant and the Gibbs free adsorption energy were obtained. A comparison of the free adsorption energy at these interfaces with the interaction energies of hexylamine and water molecules, and hexylamine molecules with each other was carried out. It was shown that hexylamine adsorption at all of these interfaces is due mainly to the hydrophobic effect of the interaction of hexylamine and water molecules. |
| first_indexed | 2024-03-11T01:34:04Z |
| format | Article |
| id | doaj.art-5061bb8d18ee46238dcef8d53236d39d |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T01:34:04Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-5061bb8d18ee46238dcef8d53236d39d2023-11-18T17:07:44ZengMDPI AGMolecules1420-30492023-06-012813507010.3390/molecules28135070Investigation of Hexylamine Adsorption on Gold in Perchloric AcidGennady I. Ostapenko0Nina A. Kalashnikova1Medicinal Chemistry Center, Togliatti State University, 14 Belorusskaya St., 445020 Togliatti, RussiaMedicinal Chemistry Center, Togliatti State University, 14 Belorusskaya St., 445020 Togliatti, RussiaThe adsorption of hexylamine at the solution–gold interface in 1 M HClO<sub>4</sub> in the presence of 0.1 M Fe<sup>2+</sup> and 0.1 Fe<sup>3+</sup> was studied by potentiodynamic, chronoamperometric and EIS methods. The main kinetic characteristics of the oxidation-reduction reaction iron ions (exchange current density, transfer coefficient, diffusion coefficients of iron ions) were determined. It was shown that the physical adsorption of hexylamine on gold can be described by the Dhar–Flory–Huggins isotherm. The values of the adsorption constant and the Gibbs free adsorption energy were obtained. A comparison of the free adsorption energy at these interfaces with the interaction energies of hexylamine and water molecules, and hexylamine molecules with each other was carried out. It was shown that hexylamine adsorption at all of these interfaces is due mainly to the hydrophobic effect of the interaction of hexylamine and water molecules.https://www.mdpi.com/1420-3049/28/13/5070goldsurfactanthexylamineadsorptioncyclic voltammetrychronoamperometry |
| spellingShingle | Gennady I. Ostapenko Nina A. Kalashnikova Investigation of Hexylamine Adsorption on Gold in Perchloric Acid Molecules gold surfactant hexylamine adsorption cyclic voltammetry chronoamperometry |
| title | Investigation of Hexylamine Adsorption on Gold in Perchloric Acid |
| title_full | Investigation of Hexylamine Adsorption on Gold in Perchloric Acid |
| title_fullStr | Investigation of Hexylamine Adsorption on Gold in Perchloric Acid |
| title_full_unstemmed | Investigation of Hexylamine Adsorption on Gold in Perchloric Acid |
| title_short | Investigation of Hexylamine Adsorption on Gold in Perchloric Acid |
| title_sort | investigation of hexylamine adsorption on gold in perchloric acid |
| topic | gold surfactant hexylamine adsorption cyclic voltammetry chronoamperometry |
| url | https://www.mdpi.com/1420-3049/28/13/5070 |
| work_keys_str_mv | AT gennadyiostapenko investigationofhexylamineadsorptionongoldinperchloricacid AT ninaakalashnikova investigationofhexylamineadsorptionongoldinperchloricacid |