Gutiérrez-Tarriño, S.; Portorreal-Bottier, A.; Trasobares, S.; Calvente, JJ.; Calvino, JJ.; Olloqui-Sariego, JL.; Oña-Burgos, P. (2023). Understanding the potential-induced activation of a cobalt MOF electrocatalyst for the oxygen evolution reaction. Applied Surface Science. 623. https://doi.org/10.1016/j.apsusc.2023.157001
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/205677
Título:
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Understanding the potential-induced activation of a cobalt MOF electrocatalyst for the oxygen evolution reaction
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Autor:
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Gutiérrez-Tarriño, Silvia
Portorreal-Bottier, Arismendy
Trasobares, Susana
Calvente, Juan José
Calvino, Juan José
Olloqui-Sariego, José Luis
Oña-Burgos, Pascual
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Fecha difusión:
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Resumen:
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[EN] Metal-organic frameworks (MOFs) are attractive porous materials for electrocatalytic applications associated with carbon-free energy storage and conversion. This type of material usually requires a post-treatment to ...[+]
[EN] Metal-organic frameworks (MOFs) are attractive porous materials for electrocatalytic applications associated with carbon-free energy storage and conversion. This type of material usually requires a post-treatment to be used as electrocatalyst. The present work comprehensively investigates the electrochemical activation of a cobalt-MOF@Nafion composite that produces outstanding electrocatalytic performance for the water oxidation reaction at neutral pH. A detailed electrochemical characterization reveals that the electroactivation of the composite requires the participation of the oxygen evolution reaction (OER) and leads to a significant increase in the electroactive population of cobalt centers. It is shown that an increase of the applied activation potential in the OER region results in a faster electroactivation of the Co-MOF without affecting the intrinsic electrocatalytic properties of the active cobalt centers, as evidenced by the unique linear correlation between the electrocatalytic OER current and the population of electroactive cobalt. In addition, at structural level, it is shown that the electrochemical activation causes the partial disruption of the Nafion adlayer, as well as morphological changes of the Co-MOF particles from a compact, rounded morphology, before electrochemical activation, to a more open and expanded structure, after electroactivation; with the concomitant increase of the number of surface--exposed cobalt centers. Interestingly, these cobalt centers retain their coordinative chemistry and their laminar distribution in the nanosheets at the nanoscale, which is consistent with the preservation of their intrinsic electrocatalytic activity after potential-induced activation. In this scenario, these results suggest that only the electroactivated cobalt centers with good accessibility to the electrolyte are electrochemically active. This work provides a better understanding of the processes and structural changes underlying the electrochemical acti-vation at neutral pH of a Co-MOF for boosting the electrocatalytic water oxidation reaction.
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Palabras clave:
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MOF-electrode interface
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Electrochemical activation
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Structural evolution
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Advance microscopy techniques
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Electrocatalytic oxygen evolution reaction
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2D-Cobalt-MOF
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Derechos de uso:
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Reconocimiento - No comercial (by-nc)
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Fuente:
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Applied Surface Science. (issn:
0169-4332
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DOI:
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10.1016/j.apsusc.2023.157001
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Editorial:
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Elsevier
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Versión del editor:
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https://doi.org/10.1016/j.apsusc.2023.157001
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Código del Proyecto:
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info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-113006RB-I00/ES/METALES NOBLES ULTRADISPERSOS SOBRE CAPAS ULTRAFINAS DE OXIDOS MODELO BASADOS EN CERIO: APLICACIONES EN PROCESOS DE CATALISIS MEDIOAMBIENTAL/
...[+]
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-113006RB-I00/ES/METALES NOBLES ULTRADISPERSOS SOBRE CAPAS ULTRAFINAS DE OXIDOS MODELO BASADOS EN CERIO: APLICACIONES EN PROCESOS DE CATALISIS MEDIOAMBIENTAL/
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-096399-A-I00/ES/CLUSTERES MULTIMETALICOS Y SUBNANOMETRICOS SOPORTADOS: SINTESIS, ESTRUCTURA Y DINAMISMO ATOMICO, Y EMPLEO COMO CATALIZADORES EN LA VALORIZACION DE METANO Y ALCANOS LIGEROS/
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2021-126799NB-I00/ES/RACIONALIZACION DE LOS FACTORES QUE REGULAN LA TRANSFERENCIA DE CARGA Y CATALISIS EN BIOELECTRODOS/
info:eu-repo/grantAgreement/EC/H2020/823717/EU/Enabling Science and Technology through European Electron Microscopy/
info:eu-repo/grantAgreement/Junta de Andalucía//PYC 20 RE 060 UAL/
info:eu-repo/grantAgreement/Junta de Andalucía//P20-01027/
info:eu-repo/grantAgreement/AEI//TED2021-130191B-C41/
info:eu-repo/grantAgreement/AEI//TED2021-130191B-C42/
info:eu-repo/grantAgreement/AEI//TED2021-130191B-C44/
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Agradecimientos:
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Authors thank the financial support by the Spanish Government (RTI2018-096399-A-I00, PID2020-113006-RB-I00, PID2021-126799NB-I00, TED2021-130191B-C41, TED2021-130191B-C42 and TED2021-130191B-C44 funded by MCIN/AEI/10.130 ...[+]
Authors thank the financial support by the Spanish Government (RTI2018-096399-A-I00, PID2020-113006-RB-I00, PID2021-126799NB-I00, TED2021-130191B-C41, TED2021-130191B-C42 and TED2021-130191B-C44 funded by MCIN/AEI/10.13039/501100011033) and Junta de Andalucia (P20-01027 and PYC 20 RE 060 UAL). The authors acknowledge funding from the European Union's Horizon 2020 research and innovation program under Grant 823717-ESTEEM3. Electron microscopy studies were performed at the DME-UCA node of the Spanish Unique Infrastructure (ICTS) on Electron Microscopy of Materials ELECMI. The authors thank Dr. A. Raya-Baron for his support on this work.
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Tipo:
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Artículo
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