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Issue 36, 2018
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Reactive template-induced core–shell FeCo@C microspheres as multifunctional electrocatalysts for rechargeable zinc–air batteries

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Abstract

Sluggish kinetics and thermodynamic unfavorability restrict electrocatalysis for energy storage and conversion reactions such as oxygen reduction/evolution and hydrogen evolution reactions. Herein, we report the synthesis and electrochemical performance of novel core–shell nanoparticles@porous carbon microspheres. A unique core–shell architecture of dual-phase FeCo-based nanoparticles@heteroatom-doped carbon microspheres (FeCo@C MS) has been prepared via a two-step carbonization process from a reactive multifunctional core-double shell template. With the advantages of heterogeneous composition and architectural structure, the obtained FeCo@C MS exhibits excellent performances for the electrochemical oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER), which are comparable to those of commercial Pt/C catalyst. As an excellent cathode catalyst of the Zn–air battery (ZAB), FeCo@C MS exhibits high discharge voltage of 1.27 V, high specific capacity of 503 mA h gZn−1, an energy density of 639 W h kgZn−1, and better cycling durability than the battery having a mixture of 20 wt% Pt/C and RuO2. This approach provides a new way to design structures with controlled morphology and excellent multifunctional electrocatalytic activity.

Graphical abstract: Reactive template-induced core–shell FeCo@C microspheres as multifunctional electrocatalysts for rechargeable zinc–air batteries

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Publication details

The article was received on 27 Mar 2018, accepted on 01 Jun 2018 and first published on 04 Jun 2018


Article type: Paper
DOI: 10.1039/C8NR02492H
Citation: Nanoscale, 2018,10, 17021-17029
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    Reactive template-induced core–shell FeCo@C microspheres as multifunctional electrocatalysts for rechargeable zinc–air batteries

    Y. Xu, B. Chen, J. Nie and G. Ma, Nanoscale, 2018, 10, 17021
    DOI: 10.1039/C8NR02492H

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