Metal–organic framework hybrid-assisted formation of Co3O4/Co-Fe oxide double-shelled nanoboxes for enhanced oxygen evolution
Guan, Bu Yuan
Lou, David Xiong Wen
Date of Issue2018
School of Chemical and Biomedical Engineering
Rational design of complex metal–organic framework (MOF) hybrid precursors offers great opportunity to construct various functional nanostructures. Here, a novel MOF hybrid-assisted strategy to synthesize Co3O4/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)6] 3− ions at room temperature. Subsequently, an annealing treatment is applied to prepare Co3O4/Co-Fe oxide double-shelled nanoboxes. Owing to the structural and compositional benefits, the as-derived Co3O4/Co-Fe oxide double-shelled nanoboxes exhibit enhanced electrocatalytic performance for oxygen evolution reaction in alkaline solution.
© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. This paper was published in Advanced Materials and is made available with permission of Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.