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Reactive Template-Induced Core-Shell FeCo@C Microspheres as Multifunctional Electrocatalysts for Rechargeable Zinc-Air Batteries

Abstract

Kinetic sluggish and thermodynamic unfavourableness is a bottleneck of electrocatalysis for energy storage and conversion such as oxygen reduction/evolution and hydrogen evolution. 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 advantages of heterogeneous composition and architectural structure, the obtained FeCo@C MS exhibits excellent performance in electrochemical oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER), which are comparable to the commercial Pt/C catalyst. As an excellent cathode catalyst of the Zn-air battery (ZAB), FeCo@C MS exhibits higher discharge voltage of 1.27 V, higher specific capacity of 503 mAh g-1Zn and energy density of 639 Wh kg-1Zn, better cycling durability than the battery with the mixture of 20 wt% Pt/C and RuO2. This approach provides a new way to design the structure with controlled morphology and excellent multifunctional electrocatalytic activity.

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Supplementary files

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, Accepted Manuscript
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    Reactive Template-Induced Core-Shell FeCo@C Microspheres as Multifunctional Electrocatalysts for Rechargeable Zinc-Air Batteries

    G. Ma, J. Nie, Y. Xu and B. chen, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR02492H

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