Manganese oxides/LaMnO3 perovskite materials and their application in the oxygen reduction reaction
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Título: | Manganese oxides/LaMnO3 perovskite materials and their application in the oxygen reduction reaction |
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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 Inorgánica | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | Oxygen reduction reaction | LaMnO3 perovskite | Manganese oxygen | Carbon black | Synergistic effect |
Área/s de conocimiento: | Química Inorgánica | Química Física |
Fecha de publicación: | 11-feb-2022 |
Editor: | Elsevier |
Cita bibliográfica: | Energy. 2022, 247: 123456. https://doi.org/10.1016/j.energy.2022.123456 |
Resumen: | Manganese-based materials can catalyze the oxygen reduction reaction (ORR), although their activity is known to depend on the crystalline phases and on the concentration of surface-active species. In the present study, we have optimized these two parameters to obtain improved catalysts for ORR. A sol-gel method was used to synthesize LaMnO3-manganese oxides composites with different lanthanum-to-manganese atomic ratios. The synthesized materials, which can be described as La1-xMnOz, were tested under ORR conditions and characterized by several physicochemical techniques such as SEM, XPS, EDX or XRD. It was found that the concentration of lanthanum governs the formation of different crystal phases and determines the crystallite size. Besides, high values of x tend to increase the surface concentration of manganese and therefore to produce more active sites for ORR. Among the materials analysed, La0.6MnOz mixed with carbon black (Vulcan) showed the best electrocatalytic performance. The high tolerance to methanol makes this electrocatalyst a promising alternative to substitute Pt-based materials in alkaline electrolytes. |
Patrocinador/es: | The authors thank to the Ministerio de Ciencia e Innovación (PID2019-105923RB-I00) for financial support. J.X.F.-L. gratefully acknowledges MINECO for financial support through an FPI contract (BES-2017-081598). |
URI: | http://hdl.handle.net/10045/121695 |
ISSN: | 0360-5442 (Print) | 1873-6785 (Online) |
DOI: | 10.1016/j.energy.2022.123456 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2022 The Authors. Published by Elsevier Ltd. 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.energy.2022.123456 |
Aparece en las colecciones: | INV - GEPE - Artículos de Revistas INV - MCMA - Artículos de Revistas |
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Flores-Lasluisa_etal_2022_Energy_final.pdf | 1,1 MB | Adobe PDF | Abrir Vista previa | |
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