Journal
SMALL
Volume 15, Issue 13, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201805324
Keywords
Co-Fe alloy; hollow structures; MOFs; N-doped carbon; oxygen reduction reaction
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Funding
- National Research Foundation (NRF) of Singapore via the NRF Investigatorship [NRF-NRFI2016-04]
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Metal-organic framework (MOF) composites have recently been considered as promising precursors to derive advanced metal/carbon-based materials for various energy-related applications. Here, a dual-MOF-assisted pyrolysis approach is developed to synthesize Co-Fe alloy@N-doped carbon hollow spheres. Novel core-shell architectures consisting of polystyrene cores and Co-based MOF composite shells encapsulated with discrete Fe-based MOF nanocrystallites are first synthesized, followed by a thermal treatment to prepare hollow composite materials composed of Co-Fe alloy nanoparticles homogeneously distributed in porous N-doped carbon nanoshells. Benefitting from the unique structure and composition, the as-derived Co-Fe alloy@N-doped carbon hollow spheres exhibit enhanced electrocatalytic performance for oxygen reduction reaction. The present approach expands the toolbox for design and preparation of advanced MOF-derived functional materials for diverse applications.
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