Detection of Superoxide Anion Oxygen Reduction Reaction Intermediate on Pt(111) by Infrared Reflection Absorption Spectroscopy in Neutral pH Conditions
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Título: | Detection of Superoxide Anion Oxygen Reduction Reaction Intermediate on Pt(111) by Infrared Reflection Absorption Spectroscopy in Neutral pH Conditions |
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Autor/es: | Briega-Martos, Valentín | Cheuquepán, William | Feliu, Juan M. |
Grupo/s de investigación o GITE: | Electroquímica de Superficies |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica |
Palabras clave: | Infrared reflection absorption spectroscopy | Neutral pH conditions | Oxygen reduction reaction | Superoxide anion species | Pt(111) |
Área/s de conocimiento: | Química Física |
Fecha de publicación: | 4-feb-2021 |
Editor: | American Chemical Society |
Cita bibliográfica: | The Journal of Physical Chemistry Letters. 2021, 12(6): 1588-1592. https://doi.org/10.1021/acs.jpclett.0c03510 |
Resumen: | In this work, in situ external infrared reflection absorption spectroscopy (IRRAS) is successfully employed for the detection of intermediate species in the oxygen reduction reaction (ORR) mechanism on a flat and well-defined Pt surface. Superoxide anion species (O2–) are detected on the Pt(111) surface in an O2-saturated solution with a NaF/HClO4 mixture with pH 5.5 by the observation of a O–O vibration band at ca. 1080 cm–1. The observation of O2– without the use of any other additional method of signal enhancement is possible because in these experimental conditions O2– is the main ORR-generated intermediate and its reactivity is limited in this pH. This leads to the accumulation of O2– near the Pt surface, facilitating its identification. |
Patrocinador/es: | This work has been financially supported by MCINN (FEDER) (Spain) through project PID2019-105653GB-100. |
URI: | http://hdl.handle.net/10045/113227 |
ISSN: | 1948-7185 |
DOI: | 10.1021/acs.jpclett.0c03510 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2021 American Chemical Society. Creative Commons Attribution 4.0 International License (CC BY 4.0) |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1021/acs.jpclett.0c03510 |
Aparece en las colecciones: | INV - EQSUP - Artículos de Revistas |
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Briega-Martos_etal_2021_JPhysChemLett.pdf | 915,53 kB | Adobe PDF | Abrir Vista previa | |
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