Copper ferrite nanospheres composites mixed with carbon black to boost the oxygen reduction reaction
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Título: | Copper ferrite nanospheres composites mixed with carbon black to boost the oxygen reduction reaction |
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Autor/es: | Flores-Lasluisa, Jhony Xavier | Salinas-Torres, David | López-Ramón, María Victoria | Álvarez, Miguel Á. | Moreno-Castilla, Carlos | 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: | Copper ferrite | Nanosphere composites | Electrocatalyst | Oxygen reduction reaction |
Área/s de conocimiento: | Química Física | Química Inorgánica |
Fecha de publicación: | 20-mar-2021 |
Editor: | Elsevier |
Cita bibliográfica: | Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2021, 613: 126060. https://doi.org/10.1016/j.colsurfa.2020.126060 |
Resumen: | Copper ferrite nanospheres (CFNS) were prepared by a solvothermal method and they were calcined at different temperatures ranging from 200−600 °C, resulting in CFNS-based materials with different both surface chemistry and structural features, which play a crucial role in the electrocatalytic activity of carbon black-containing CFNS catalysts towards the oxygen reduction reaction (ORR). The study was addressed to elucidate which kind of crystalline phases, as well as surface chemistry of CFNS were responsible for enhancing the electrocatalytic activity in ORR. The pristine CFNS and CFNS200 (calcined at 200 °C) exhibited cubic spinel, cuprite and copper as main crystalline phases. In the case of CFNS400, it also displays the cubic phase along with a new phase (tenorite). Apart from the tenorite, CFNS600 exhibited hematite, and the cubic phase of spinel shifted to the tetragonal phase. Regarding the electrocatalytic activity in ORR, the CFNS revealed poor activities compared to those of carbon black-containing CFNS catalysts. The high-performing catalyst was CFNS400/Vulcan in terms of current density and onset potential along with its good stability. This improvement may be assigned to both the chemical composition and structure. |
Patrocinador/es: | The authors (E.M., J.X.F.-L., D.S.-T.) thank MICINN (PID2019-105923RB-I00) for the financial support. J.X.F.-L. gratefully acknowledges MINECO for the financial support through an FPI contract (BES-2017-081598). D.S.-T. thanks MICINN for the “Juan de la Cierva” contract (IJCI-2016-27636). |
URI: | http://hdl.handle.net/10045/115004 |
ISSN: | 0927-7757 (Print) | 1873-4359 (Online) |
DOI: | 10.1016/j.colsurfa.2020.126060 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2020 Elsevier B.V. |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1016/j.colsurfa.2020.126060 |
Aparece en las colecciones: | INV - GEPE - Artículos de Revistas INV - MCMA - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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Flores-Lasluisa_etal_2021_ColloidsSurfacesA_final.pdf | Versión final (acceso restringido) | 3,66 MB | Adobe PDF | Abrir Solicitar una copia |
Flores-Lasluisa_etal_2021_ColloidsSurfacesA_revised.pdf | Versión revisada (acceso abierto) | 746,95 kB | Adobe PDF | Abrir Vista previa |
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