New insights into the hydrogen peroxide reduction reaction and its comparison with the oxygen reduction reaction in alkaline media on well-defined platinum surfaces
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Título: | New insights into the hydrogen peroxide reduction reaction and its comparison with the oxygen reduction reaction in alkaline media on well-defined platinum surfaces |
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Autor/es: | Rizo, Rubén | Feliu, Juan M. | Herrero, Enrique |
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: | Platinum electrodes | Oxygen reduction reaction | Hydrogen peroxide reduction reaction | Single crystal surfaces | Effect of the surface structure |
Área/s de conocimiento: | Química Física |
Fecha de publicación: | jun-2021 |
Editor: | Elsevier |
Cita bibliográfica: | Journal of Catalysis. 2021, 398: 123-132. https://doi.org/10.1016/j.jcat.2021.04.018 |
Resumen: | The hydrogen peroxide reduction reaction (HPRR) is investigated at pH = 13 on the Pt basal planes and stepped surfaces with (1 1 1) terraces separated by either monatomic (1 0 0) or (1 1 0) steps. A quantitative analysis of the surface structure effect revealed that Pt(1 1 1) is the most active surface and its activity progressively decreases when steps are introduced. Additionally, inhibition of the HPRR is observed at low potentials, which onset potential is governed by the OHads and the point of maximum entropy (pme) of the interphase. Experiments with different rotation rates suggest the formation of an HPRR intermediate linked to the inhibition process, which is more strongly adsorbed on (1 1 0) than (1 0 0) steps. Finally, a comparison of the HPRR and ORR (oxygen reduction reaction) illustrated the important differences for both reactions, which are dependent on the step density. These divergences have been discussed based on adsorbed intermediates and O2 interactions with the Pt surface. |
Patrocinador/es: | Financial support from Ministerio de Ciencia e Innovación (Project PID2019-105653 GB-100) and Generalitat Valenciana (Project PROMETEO/2020/063) is acknowledged. |
URI: | http://hdl.handle.net/10045/114951 |
ISSN: | 0021-9517 (Print) | 1090-2694 (Online) |
DOI: | 10.1016/j.jcat.2021.04.018 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2021 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1016/j.jcat.2021.04.018 |
Aparece en las colecciones: | INV - EQSUP - Artículos de Revistas |
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