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
Authors: Cheuquepán, William | Orts Mateo, José M. | Rodes García, 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

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