6533b828fe1ef96bd1288df5

RESEARCH PRODUCT

Cobalt Metal-Organic Framework based on two dinuclear secondary building units for electrocatalytic oxygen evolution

Silvia Gutiérrez-tarriñoFernando ReyMiguel PalominoJosé Luis Olloqui‐sariegoJosé L. JordáGuillermo Mínguez EspallargasPascual Oña‐burgosJuan José Calvente

subject

Materials scienceCobalt clusterLibrary scienceOxygen evolution reaction and gas storage02 engineering and technologyCobalt010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesCobalt MOF0104 chemical sciencesQUIMICA ORGANICAQUIMICA ANALITICACobalt metalGeneral Materials Science0210 nano-technologyElectrocatalysisMaterials

description

[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.

yearjournalcountryeditionlanguage
2019-01-01
10.1021/acsami.9b13655https://doi.org/10.1021/acsami.9b13655