Cobalt Metal Organic Framework Based on Two Dinuclear Secondary Building Units for Electrocatalytic Oxygen Evolution

[EN] The synthesis of a new microporous metal-organic framework (MOF) based on two secondary building units, with dinuclear cobalt centers, has been developed. The employment of a well-defined cobalt cluster results in an unusual topology of the Co-2-MOF, where one of the cobalt centers has three op...

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Detalles Bibliográficos
Autores: Gutiérrez-Tarriño, Silvia, Palomino Roca, Miguel|||0000-0003-2983-1038, Jorda Moret, Jose Luis|||0000-0002-0304-5680, Rey Garcia, Fernando|||0000-0003-3227-5669, Oña-Burgos, Pascual|||0000-0002-2341-7867, Olloqui Sariego, José Luis, Calvente, Juan José, Mínguez Espallargas, Guillermo
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:10251/150649
Acceso en línea:https://riunet.upv.es/handle/10251/150649
Access Level:acceso abierto
Palabra clave:Cobalt cluster
Cobalt MOF
Electrocatalysis
Oxygen evolution reaction and gas storage
QUIMICA ORGANICA
QUIMICA ANALITICA
Descripción
Sumario:[EN] The synthesis of a new microporous metal-organic framework (MOF) based on two secondary building units, with dinuclear cobalt centers, has been developed. The employment of a well-defined cobalt cluster results in an unusual topology of the Co-2-MOF, where one of the cobalt centers has three open coordination positions, which has no precedent in MOF materials based on cobalt. Adsorption isotherms have revealed that Co-2-MOF is in the range of best CO2 adsorbents among the carbon materials, with very high CO2/CH4 selectivity. On the other hand, dispersion of Co-2-MOF in an alcoholic solution of Nafion gives rise to a composite (Co-2-MOF@Nafion) with great resistance to hydrolysis in aqueous media and good adherence to graphite electrodes. In fact, it exhibits high electrocatalytic activity and robustness for the oxygen evolution reaction (OER), with a turnover frequency number value superior to those reported for similar electrocatalysts. Overall, this work has provided the basis for the rational design of new cobalt OER catalysts and related materials employing well-defined metal clusters as directing agents of the MOF structure.

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