One-step synthesis of MN4 molecular electrocatalysts assembled on different nanocarbon architectures for efficient oxygen reduction
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Título: | One-step synthesis of MN4 molecular electrocatalysts assembled on different nanocarbon architectures for efficient oxygen reduction |
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Autor/es: | Trigueros-Sancho, Alicia | Martínez-Sánchez, Beatriz | 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: | One-step synthesis | Solvent-free ball-milling | Mechanochemistry | Carbon materials | Iron and cobalt phthalocyanines | Oxygen reduction reaction | Electrocatalysis | Precious metal-free catalyst |
Fecha de publicación: | 10-may-2023 |
Editor: | Elsevier |
Cita bibliográfica: | Carbon. 2023, 211: 118100. https://doi.org/10.1016/j.carbon.2023.118100 |
Resumen: | One-step dry ball-milling method was employed to prepare different electrocatalysts based on cobalt(II) or iron(II) phthalocyanines (CoPc and FePc, respectively) supported on commercial carbon materials (CNovel or a carbon black (Vulcan)), controlling the nominal metal content to 1 or 2 wt %. No pre-treatment (e.g., functionalization of the carbon support), solvent addition or post-processing steps (e.g., heat-treatment, acid-treatment, etc.) were required before, during or after the mechanochemical process. Different characterization techniques have been used to study the morphological, physicochemical and electrochemical properties of the synthesized materials. The as-prepared catalysts can be directly used without involving further procedure. Solid-state ball-milling strategy provides excellent contact of both components, which synergistically improved their electrocatalytic performance. Regarding the carbon materials, the adequate nanoarchitecture and surface chemistry of CNovel permits better distribution of metal phthalocyanines (MPc) compared to a carbon black. The FePc supported on CNovel shows excellent electrocatalytic activity for oxygen reduction reaction (ORR), in terms of good selectivity towards the 4-electron pathway, long-term stability and low overpotential in alkaline medium. This study opens new paths for a simple, scalable and cost-effective catalyst manufacturing through mechanochemistry that can be modulated by selecting the proper nanocarbon support and MPc/carbon ratio. |
Patrocinador/es: | B.M.-S. and A.T.S thank “Ministerio de Educación y Formación Profesional” for the FPU grant (FPU18/05127) and for the collaboration grant (20CO1/013464), respectively. The authors would like to thank PID2019-105923RB-I00 and PID2021-123079OB-I00 projects funded by DSL and “ERDF A way of making Europe”. |
URI: | http://hdl.handle.net/10045/134263 |
ISSN: | 0008-6223 (Print) | 1873-3891 (Online) |
DOI: | 10.1016/j.carbon.2023.118100 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2023 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.carbon.2023.118100 |
Aparece en las colecciones: | INV - MCMA - Artículos de Revistas INV - GEPE - Artículos de Revistas |
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Trigueros-Sancho_etal_2023_Carbon.pdf | 12,34 MB | Adobe PDF | Abrir Vista previa | |
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