Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 10, Issue 6, Pages 3169-3177Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ta09678h
Keywords
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Funding
- National Natural Science Foundation of China [21975097, 21871042, 21673098, 51975245]
- Key Science and Technology R&D Projects of Jilin Province [2020C023-3]
- Program of Jilin University Science and Technology Innovative Research Team [2020TD-03]
- Natural Science Foundation of Jilin Province [20200201083JC]
- Jilin Provincial Education Department [JJKH20201169KJ]
- Jilin Provincial Science & Technology Department [20190303039SF]
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This study presents a simple synthetic route for crafting Fe and Zn bimetallic sites on 1D N-doped carbon nanotubes, which exhibit remarkable ORR activity and methanol tolerance in an alkaline electrolyte, making them suitable for use in liquid rechargeable zinc-air batteries.
N-coordinated transition-metal materials are promising electrocatalysts for various sustainable and efficient electrochemical energy conversion and storage devices. Here we report a simple synthetic route for simultaneously crafting Fe and Zn bimetallic sites on 1D N-doped hollow mesoporous multi-walled carbon nanotubes (denoted as Fe-Zn/N/C/MWCNTs-800). Attributed to the synergistic effect between the Fe-N-x center and Zn-N-x center on the coupled conductive heterostructured carbon matrix with moderate pyridinic-N and graphitic-N species, the Fe-Zn/N/C/MWCNTs-800 catalyst exhibited remarkable ORR activity, favorable long-term stability, and remarkable methanol tolerance in an alkaline electrolyte, comparable to commercial 20 wt% Pt/C. Moreover, the assembled flow liquid rechargeable Zn-air batteries with Fe-Zn/N/C/MWCNTs-800 as a cathode material also exhibited excellent open-circuit voltage, power density, and cycling stability over 180 h. This report provides a general strategy for fabricating Zn-based N-coordinated transition-metal electrocatalysts for catalytic applications.
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