Metal-Organic Framework Hybrid-Assisted Formation of Co3 O4 /Co-Fe Oxide Double-Shelled Nanoboxes for Enhanced Oxygen Evolution

Xiao Wang; Le Yu; Bu Yuan Guan; Shuyan Song; Xiong Wen David Lou

doi:10.1002/adma.201801211

Metal-Organic Framework Hybrid-Assisted Formation of Co₃ O₄ /Co-Fe Oxide Double-Shelled Nanoboxes for Enhanced Oxygen Evolution

Adv Mater. 2018 May 21:e1801211. doi: 10.1002/adma.201801211. Online ahead of print.

Authors

Xiao Wang¹, Le Yu¹, Bu Yuan Guan¹, Shuyan Song², Xiong Wen David Lou¹

Affiliations

¹ School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.
² State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China.

PMID: 29782694
DOI: 10.1002/adma.201801211

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 Co₃ O₄ /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 Co₃ O₄ /Co-Fe oxide double-shelled nanoboxes. Owing to the structural and compositional benefits, the as-derived Co₃ O₄ /Co-Fe oxide double-shelled nanoboxes exhibit enhanced electrocatalytic performance for oxygen evolution reaction in alkaline solution.

Keywords: MOFs; anion-exchange reactions; double-shelled; electrocatalysis; hollow structures.