Metal-Organic Framework Hybrid-Assisted Formation of Co<sub>3</sub> O<sub>4</sub> /Co-Fe Oxide Double-Shelled Nanoboxes for Enhanced Oxygen Evolution.
basic_science · Level V
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- Record sourced from PubMed, PMID 29782694.
- Also identified by DOI 10.1002/adma.201801211.
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Abstract
Rational design of complex metal-organic framework (MOF) hybrid precursors offers a great opportunity to construct various functional nanostructures. Here, a novel MOF-hybrid-assisted strategy to synthesize Co<sub>3</sub> O<sub>4</sub> /Co-Fe oxide double-shelled nanoboxes is reported. In the first step, zeolitic imidazolate framework-67 (ZIF-67, a Co-based MOF)/Co-Fe Prussian blue analogue (PBA) yolk-shell nanocubes are formed via a facile anion-exchange reaction between ZIF-67 nanocube precursors and [Fe(CN)<sub>6</sub> ]<sup>3-</sup> ions at room temperature. Subsequently, an annealing treatment is applied to prepare Co<sub>3</sub> O<sub>4</sub> /Co-Fe oxide double-shelled nanoboxes. Owing to the structural and compositional benefits, the as-derived Co<sub>3</sub> O<sub>4</sub> /Co-Fe oxide double-shelled nanoboxes exhibit enhanced electrocatalytic performance for oxygen evolution reaction in alkaline solution.