Carbon Material and Cobalt-Substitution Effects in the Electrochemical Behavior of LaMnO3 for ORR and OER
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Título: | Carbon Material and Cobalt-Substitution Effects in the Electrochemical Behavior of LaMnO3 for ORR and OER |
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Autor/es: | Flores-Lasluisa, Jhony Xavier | Huerta Arráez, Francisco | Cazorla-Amorós, Diego | Morallon, Emilia |
Grupo/s de investigación o GITE: | Electrocatálisis y Electroquímica de Polímeros | Materiales Carbonosos y Medio Ambiente |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | Cobalt-substitution | LaMnO3 perovskite | Carbon materials | Oxygen reduction reaction | Oxygen evolution reaction |
Área/s de conocimiento: | Química Física | Química Inorgánica |
Fecha de publicación: | 30-nov-2020 |
Editor: | MDPI |
Cita bibliográfica: | Flores-Lasluisa JX, Huerta F, Cazorla-Amorós D, Morallon E. Carbon Material and Cobalt-Substitution Effects in the Electrochemical Behavior of LaMnO3 for ORR and OER. Nanomaterials. 2020; 10(12):2394. https://doi.org/10.3390/nano10122394 |
Resumen: | LaMn1−xCoxO3 perovskites were synthesized by a modified sol-gel method which incorporates EDTA. These materials’ electrochemical activity towards both oxygen reduction (ORR) and oxygen evolution reactions (OER) was studied. The cobalt substitution level determines some physicochemical properties and, particularly, the surface concentration of Co and Mn’s different oxidation states. As a result, the electroactivity of perovskite materials can be tuned using their composition. The presence of cobalt at low concentration influences the catalytic activity positively, and better bifunctionality is attained. As in other perovskites, their low electrical conductivity limits their applicability in electrochemical devices. It was found that the electrochemical performance improved significantly by physically mixing with a mortar the active materials with two different carbon black materials. The existence of a synergistic effect between the electroactive component and the carbon material was interpreted in light of the strong carbon–oxygen–metal interaction. Some mixed samples are promising electrocatalysts towards both ORR and OER. |
Patrocinador/es: | This research was funded by Ministerio de Ciencia e Innovación (Grant number: PID2019-105923RB-100) and (grant number: BES-2017-081598). And the APC was funded by Universidad de Alicante. |
URI: | http://hdl.handle.net/10045/110901 |
ISSN: | 2079-4991 |
DOI: | 10.3390/nano10122394 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.3390/nano10122394 |
Aparece en las colecciones: | INV - GEPE - Artículos de Revistas INV - MCMA - Artículos de Revistas |
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