Spectroelectrochemical detection of specifically adsorbed cyanurate anions at gold electrodes with (111) orientation in contact with cyanate and cyanuric acid neutral solutions
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http://hdl.handle.net/10045/68968
Title: | Spectroelectrochemical detection of specifically adsorbed cyanurate anions at gold electrodes with (111) orientation in contact with cyanate and cyanuric acid neutral solutions |
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Authors: | Cheuquepán, William | Rodes, Antonio | Orts, José M. | Feliu, Juan M. |
Research Group/s: | Grupo de Espectroelectroquímica y Modelización (GEM) | Electroquímica de Superficies |
Center, Department or Service: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica |
Keywords: | Au(111) | Cyanuric acid | ATR-SEIRAS | DFT | Cyanate |
Knowledge Area: | Química Física |
Issue Date: | 1-Sep-2017 |
Publisher: | Elsevier |
Citation: | Journal of Electroanalytical Chemistry. 2017, 800: 167-175. doi:10.1016/j.jelechem.2017.02.015 |
Abstract: | The adsorption and reactivity of cyanate at Au(111) single crystal and Au(111)-25 nm thin film electrodes is studied spectroelectrochemically in sodium perchlorate solutions and compared to those of cyanuric acid (C3N3O3H3). From the Surface Enhanced Infrared Reflection Absorption spectra obtained under Attenuated Total Reflection conditions (ATR-SEIRAS) it can be concluded that adsorbed cyanate species predominate at the electrode surface for low cyanate concentrations. However, for cyanate concentrations above 1 mM, the similarity of the ATR-SEIRA spectra with those obtained in cyanuric acid containing solutions indicates that some species coming from cyanuric acid is formed and adsorbed at the (111) gold surface sites as the result of an electroless trimerization reaction. Taking into account the results of Density Functional Theory (DFT) calculations, the experimental voltammetric and ATR-SEIRAS results agree with the formation of adlayers of specifically adsorbed triketo-monocyanurate species that adsorb perpendicular to the electrode surface. |
Sponsor: | The authors acknowledge the funding by Ministerio de Economía y Competitividad (projects CTQ2016-76221-P and CTQ2016-76231-C2-2-R) and the University of Alicante (VIGROB-044 and VIGROB-263). William Cheuquepán is grateful for the award of a F.P.I. grant associated to project CTQ2009-13142. |
URI: | http://hdl.handle.net/10045/68968 |
ISSN: | 1572-6657 (Print) | 1873-2569 (Online) |
DOI: | 10.1016/j.jelechem.2017.02.015 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Rights: | © 2017 Elsevier B.V. |
Peer Review: | si |
Publisher version: | http://dx.doi.org/10.1016/j.jelechem.2017.02.015 |
Appears in Collections: | INV - GEM - Artículos de Revistas INV - EQSUP - Artículos de Revistas |
Files in This Item:
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2017_Cheuquepan_etal_JElectrChem_final.pdf | Versión final (acceso restringido) | 1,15 MB | Adobe PDF | Open Request a copy |
2017_Cheuquepan_etal_JElectrChem_accepted.pdf | Accepted Manuscript (acceso abierto) | 1,16 MB | Adobe PDF | Open Preview |
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