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Facile Synthesis of Two‐Dimensional Iron/Cobalt Metal–Organic Framework for Efficient Oxygen Evolution Electrocatalysis
Ist Teil von
Angewandte Chemie International Edition, 2021-05, Vol.60 (21), p.12097-12102
Auflage
International ed. in English
Ort / Verlag
Germany: Wiley Subscription Services, Inc
Erscheinungsjahr
2021
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
A facile synthesis is reported of two‐dimensional (2D) bimetallic (Fe/Co=1:2) metal–organic frameworks (MOF, ca. 2.2 nm thick) via simple stirring of the reaction mixture of Fe/Co salts and 1,4‐benzene dicarboxylic acid (1,4‐BDC) in the presence of triethylamine and water at room temperature. The mechanism of the 2D, rather than bulk, MOF was revealed by studying the role of each component in the reaction mixture. It was found that these 2D MOF‐Fe/Co(1:2) exhibited excellent electrocatalytic activity for the oxygen evolution reaction (OER) under basic conditions. The electrocatalytic mechanism was disclosed via both experimental results and density functional theory (DFT) calculation. The 2D morphology and co‐doping of Fe/Co contributed to the superior OER performance of the 2D MOF‐Fe/Co(1:2). The simple and efficient synthetic method is suitable for the mass production and future commercialization of functional 2D MOF with low cost and high yield.
The ultrathin MOF‐Fe/Co nanosheets (2.2 nm) can be prepared via stirring at room temperature by precise control of solvent. The 2D MOF‐Fe/Co nanosheets show an excellent OER activity, which was caused by its abundant unsaturated coordinated metal sites and the synergistic effect of iron and cobalt. The high OER activity of the 2D MOF‐Fe/Co nanosheets is further supported by the DFT calculations.