Thermodynamic studies of anion adsorption at the Pt(111) electrode surface from glycolic acid solutions
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http://hdl.handle.net/10045/53177
Títol: | Thermodynamic studies of anion adsorption at the Pt(111) electrode surface from glycolic acid solutions |
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Autors: | Arán-Ais, Rosa M. | Herrero, Enrique | Feliu, Juan M. |
Grups d'investigació o GITE: | Electroquímica de Superficies |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica |
Paraules clau: | Glycolic acid | Pt single crystals electrodes | Stepped surfaces | Thermodynamic study | In situ FTIR |
Àrees de coneixement: | Química Física |
Data de publicació: | de gener-2015 |
Editor: | Springer Berlin Heidelberg |
Citació bibliogràfica: | Journal of Solid State Electrochemistry. 2015, 19(1): 13-21. doi:10.1007/s10008-014-2646-1 |
Resum: | Kinetic glycolic acid (GA) oxidation and thermodynamic glycolate adsorption have been studied on Pt single crystal electrodes. The voltammetric profiles of Pt(111), Pt(100), and Pt(110) in 0.1 M GA are shown, and the effect of the inclusion of steps on the Pt(111) surface has been studied by cyclic voltammetry. For Pt(111) electrode, different concentrations and sweep rates have been applied, revealing that both adsorption and oxidation processes take place. By establishing the appropriate conditions, a complete thermodynamic analysis has been performed by using the electrode potential and the charge as independent variables. Total charge density curves, surface pressure at total charge density and at constant electrode potential were determined to calculate the Gibbs excess and the charge number at constant electrode potential for glycolate adsorption on Pt(111). Maximum glycolate coverage on the surface reaches a value of ∼6.0 × 1014 ions/cm2. Spectroscopic results show the formation of CO2 during the oxidation of glycolic acid, indicating that the cleavage of the C–C bond occurs during the oxidation process. |
Patrocinadors: | The work was carried out under the financial support by the MINECO (Spain) (project CTQ2013-44083-P) and Generalitat Valenciana (project PROMETEOII/2014/013). |
URI: | http://hdl.handle.net/10045/53177 |
ISSN: | 1432-8488 (Print) | 1433-0768 (Online) |
DOI: | 10.1007/s10008-014-2646-1 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Drets: | © Springer-Verlag Berlin Heidelberg 2014. The final publication is available at Springer via http://dx.doi.org/10.1007/s10008-014-2646-1 |
Revisió científica: | si |
Versió de l'editor: | http://dx.doi.org/10.1007/s10008-014-2646-1 |
Apareix a la col·lecció: | INV - EQSUP - Artículos de Revistas |
Arxius per aquest ítem:
Arxiu | Descripció | Tamany | Format | |
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2015_Aran_etal_JSolidStateElectr_final.pdf | Versión final (acceso restringido) | 2,3 MB | Adobe PDF | Obrir Sol·licitar una còpia |
2015_Aran_etal_JSolidStateElectr_preprint.pdf | Preprint (acceso abierto) | 861,28 kB | Adobe PDF | Obrir Vista prèvia |
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