Issue 44, 2022

Interfacing MnO and FeCo alloy inside N-doped carbon hierarchical porous nanospheres derived from metal–organic framework to boost high-performance oxygen reduction for Zn–air batteries

Abstract

Efficient and strong non-precious metal catalysts are urgently needed for the oxygen reduction reaction (ORR). Here, a facile hydrothermal–pyrolysis process was implemented to engineer CoFe–MnO heterointerfaces encapsulated in N-doped carbon (CFM-NC) nanospheres with a metal–organic framework (MOF) as the precursor. Due to heterointerfaces and hierarchical porosity, CFM-NC-800 exhibited superior ORR activity (half-wave potential of 0.86 V) and durability (30 000 s). Importantly, CFM-NC-800-based Zn–air batteries (ZABs) were capable of extending the outstanding performance, with a high power density of 260 mW cm−2 and a specific capacity of 812 mA h g−1. Furthermore, the CFM-NC-800-RuO2-based ZABs showed remarkable stability (480 cycles), outperforming Pt/C-RuO2 (360 cycles). This work highlights the effects of CoFe–MnO heterointerfaces and hierarchical porosity in ORR electrocatalysis, thereby providing a new avenue for energy conversion and storage.

Graphical abstract: Interfacing MnO and FeCo alloy inside N-doped carbon hierarchical porous nanospheres derived from metal–organic framework to boost high-performance oxygen reduction for Zn–air batteries

Supplementary files

Article information

Article type
Paper
Submitted
23 Sep 2022
Accepted
13 Oct 2022
First published
14 Oct 2022

Nanoscale, 2022,14, 16516-16523

Interfacing MnO and FeCo alloy inside N-doped carbon hierarchical porous nanospheres derived from metal–organic framework to boost high-performance oxygen reduction for Zn–air batteries

X. Duan, M. Xia, X. Hu, L. Yang and H. Zheng, Nanoscale, 2022, 14, 16516 DOI: 10.1039/D2NR05245H

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