Solvent-Free Synthesis of ZIFs: A Route toward the Elusive Fe(II) Analogue of ZIF-8

[EN] Herein we report the synthesis of an elusive metal-organic framework, the iron(II) analogue of ZIF-8 with the formula Fe(2-methylimidazolate)(2), here denoted as MUV-3. The preparation of this highly interesting porous material, inaccessible by common synthetic procedures, occurs in a solvent-f...

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Detalles Bibliográficos
Autores: Lopez-Cabrelles, J., Romero, J., ABELLÁN SÁEZ, GONZALO, Gimenez-Marques, M., Minguez Espallargas, G., Palomino Roca, Miguel|||0000-0003-2983-1038, Valencia Valencia, Susana|||0000-0001-7160-2795, Rey Garcia, Fernando|||0000-0003-3227-5669
Tipo de recurso: artículo
Fecha de publicación:2019
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/154120
Acceso en línea:https://riunet.upv.es/handle/10251/154120
Access Level:acceso abierto
Palabra clave:Metal-Organic frameworks
Zeolitic imidazolate frameworks
Thermal-Stability
Oxygen evolution
Electrocatalysts
Adsorption
Storage
Descripción
Sumario:[EN] Herein we report the synthesis of an elusive metal-organic framework, the iron(II) analogue of ZIF-8 with the formula Fe(2-methylimidazolate)(2), here denoted as MUV-3. The preparation of this highly interesting porous material, inaccessible by common synthetic procedures, occurs in a solvent-free reaction upon addition of an easily detachable template molecule, yielding single crystals of MUV-3. This methodology can be extended to other metals and imidazolate derivatives, allowing the preparation of ZIF-8, ZIF-67, and the unprecedented iron(II) ZIFs Fe(2-ethylimidazolate)(2) and Fe(2-methylbenzimidazolate)(2). The different performance of MUV-3 toward NO sorption, in comparison to ZIF-8, results from the chemisorption of NO molecules, which also causes a gate-opening behavior. Finally, the controlled pyrolysis of MUV-3 results in a N-doped graphitic nanocomposite that exhibits extraordinary performance for the oxygen evolution reaction (OER), with low overpotential at different current densities (316 mV at 10 mA cm(-2)), low Tafel slope (37 mV per decade), high maximum current density (710 mA cm(-2) at 2.0 V vs RHE), and great durability (15 h).

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