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Issue 20, 2018
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Bifunctional electrocatalysts of MOF-derived Co–N/C on bamboo-like MnO nanowires for high-performance liquid- and solid-state Zn–air batteries

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Abstract

Exploration of cost-effective electrocatalysts that could replace noble metals to promote the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) holds great potential for large-scale applications in energy storage devices such as metal–air batteries. Metal–organic frameworks (MOFs) provide a new route to design highly active catalysts owing to their adjustable composition, morphology and surface area. Herein, a highly efficient bifunctional catalyst was fabricated by forming an interconnected and conducting Co–N/C framework on bamboo-like hollow MnO nanowires. The hybrid demonstrates prominent ORR/OER activity and promising potential in rechargeable Zn–air batteries. Especially, when assembled into solid-state Zn–air batteries, high open-circuit potential and stable discharge–charge cycling platforms were achieved. The outstanding performances stem from the synergistic effect of the two composites in one-dimensional nanowires, facilitating the convenient and sustainable diffusion of electrolytes to active sites. This work provides a new guideline to optimize MOF-derived materials as substitutes for Pt/C and RuO2 noble-metal catalysts for air cathodes in both liquid- and solid-state Zn–air batteries.

Graphical abstract: Bifunctional electrocatalysts of MOF-derived Co–N/C on bamboo-like MnO nanowires for high-performance liquid- and solid-state Zn–air batteries

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Article information


Submitted
26 Feb 2018
Accepted
20 Apr 2018
First published
21 Apr 2018

J. Mater. Chem. A, 2018,6, 9716-9722
Article type
Paper

Bifunctional electrocatalysts of MOF-derived Co–N/C on bamboo-like MnO nanowires for high-performance liquid- and solid-state Zn–air batteries

Y. Chen, Y. Guo, H. Cui, Z. Xie, X. Zhang, J. Wei and Z. Zhou, J. Mater. Chem. A, 2018, 6, 9716
DOI: 10.1039/C8TA01859F

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