Selective design of MOF-derived electrocatalytic interphases by potential-driven surface reconstruction
[EN] Metal-organic frameworks (MOFs) can be used as precursors for the directed synthesis of derived materials with enhanced performance for electrocatalysis. Herein, we report on an in-situ electrochemical strategy for the selective synthesis of hybrid electrocatalysts using a cobalt MOF (2D-CoMOF)...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:dnet:riunet______::8433707ca528f8a47752a4be36e79374 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/233866 |
| Access Level: | acceso abierto |
| Palabra clave: | MOF-derived electrocatalyst MOF surface reconstruction Operando raman spectroelectrochemistry Glucose oxidation reaction |
| Sumario: | [EN] Metal-organic frameworks (MOFs) can be used as precursors for the directed synthesis of derived materials with enhanced performance for electrocatalysis. Herein, we report on an in-situ electrochemical strategy for the selective synthesis of hybrid electrocatalysts using a cobalt MOF (2D-CoMOF) as a precursor for constructing electrochemical sensors to monitor the glucose oxidation reaction (GOR). By using in-situ Raman spectroelectrochemistry, it is demonstrated that a precise control of the applied potential during amperometric treatment of 2D-CoMOF can promote the generation of derived heterostructures in which the original MOF coexists with metal oxides and/or oxyhydroxides (MOF-MOx) with different compositions. The so-prepared electrodes exhibit high electroactive surface areas, a high number of electrocatalytically active cobalt sites and an efficient charge transport across the catalytic film. Moreover, their composition-dependent electrocatalytic performance for the glucose oxidation reaction is examined, establishing a relationship between the applied potential, the macroscopic chemical composition of the heterostructure and the electrocatalytic performance for glucose sensing. In particular, the hybrid phases consisting of Co-MOF/Co3O4/CoOOH display superior electrocatalytic sensing performance with a wide linear concentration range and high sensitivity. The present work emphasizes the significance that the precise control of the applied potential has on the electrochemically-assisted MOF transformation for developing highly efficient MOF-derived electrocatalysts. |
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