Voltammetric and in situ infrared spectroscopy studies of hydroxyurea electrooxidation at Au(111) electrodes in HClO4 solutions
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Title: | Voltammetric and in situ infrared spectroscopy studies of hydroxyurea electrooxidation at Au(111) electrodes in HClO4 solutions |
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Authors: | Cheuquepán, William | Orts, José M. | Rodes, Antonio | 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) | Gold thin film | Hydroxyurea electrooxidation | External reflection infrared | ATR-SEIRAS |
Knowledge Area: | Química Física |
Issue Date: | Mar-2017 |
Publisher: | Elsevier |
Citation: | Electrochemistry Communications. 2017, 76: 34-37. doi:10.1016/j.elecom.2017.01.016 |
Abstract: | The oxidation of hydroxyurea (H2NCONHOH, HU) at Au(111) single crystal and Au(111)-25 nm thin film electrodes is studied spectroelectrochemically in HClO4 solutions using external reflection infrared and Surface Enhanced Infrared Reflection Absorption Spectroscopy under Attenuated Total Reflection conditions (ATR-SEIRAS). The in situ external reflection spectra prove the formation of dissolved carbon dioxide and adsorbed cyanate during the electrooxidation of HU. The enhanced surface sensitivity of the ATR-SEIRAS experiments facilitates the detection of adsorbed cyanate and allows the observation of other adsorbate bands tentatively ascribed to reaction intermediates involving partial oxidation of the HU molecules, some of them corresponding to nitrosyl groups. |
Sponsor: | The authors acknowledge funding by Ministerio de Economía y Competitividad (projects CTQ2016-76221-P and CTQ2016-76231-C2-2-R) and University of Alicante (VIGROB-044 and 263). William Cheuquepán is grateful for the award of a F.P.I. grant associated with project CTQ2009-13142. |
URI: | http://hdl.handle.net/10045/66570 |
ISSN: | 1388-2481 (Print) | 1873-1902 (Online) |
DOI: | 10.1016/j.elecom.2017.01.016 |
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.elecom.2017.01.016 |
Appears in Collections: | INV - GEM - Artículos de Revistas INV - EQSUP - Artículos de Revistas |
Files in This Item:
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2017_Cheuquepan_etal_ElectrComm_final.pdf | Versión final (acceso restringido) | 640,85 kB | Adobe PDF | Open Request a copy |
2017_Cheuquepan_etal_ElectrComm_revised.pdf | Versión revisada (acceso abierto) | 3,35 MB | Adobe PDF | Open Preview |
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