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Mn3O4 Nanoparticles on Layer-Structured Ti3C2 MXene towards Oxygen Reduction Reaction and Zinc-air Battery

Abstract

Non-precious metal catalysts like manganese oxide (Mn3O4) in company with efficient activity and superior stability are highly demanded. However, poor conductivity, dissolution, and high cohesion significantly limit the performance of Mn3O4 nanoparticles as an electrode material. Herein, we report the first Mn3O4 nanoparticles supported on layered Ti3C2 MXene (Mn3O4/MXene) nanocomposite with superb oxygen reduction reaction performance. The as-prepared Mn3O4/MXene nanocomposites displayed favorable electrochemical activity in the ORR with a four-electron oxygen reduction pathway-dominant and an onset potential at 0.89V (same with Pt/C) in an alkaline solution. Layered MXenes combine the metal conductivity with hydrophilicity which would greatly improve the chemical properties of the nano-sized particles by inhibiting aggregation and increasing electron transfer speed. Furthermore, the Mn3O4-MXene exhibited higher stability than Mn3O4/acetylene black owing to the highly stabilized Mn3O4/MXene hybrid structure. The as-prepared Zn-air battery based on Mn3O4/MXene air-cathode exhibit high open potential (1.37 V), superb power density (150 mW cm-2) and excellent stability (no obvious potential change in 100 hours). The preparation of low-cost Mn3O4/MXene nanocomposite with superior oxygen reduction reaction performance shows great significance on the preparation of promising candidates as oxygen reduction reaction catalyst, zinc-air battery, and other energy storage devices.

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Publication details

The article was received on 24 May 2017, accepted on 10 Sep 2017 and first published on 11 Sep 2017


Article type: Paper
DOI: 10.1039/C7TA04532H
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Mn3O4 Nanoparticles on Layer-Structured Ti3C2 MXene towards Oxygen Reduction Reaction and Zinc-air Battery

    Q. Xue, Z. Pei, Y. Huang, M. Zhu, Z. Tang, H. Li, Y. HUANG, N. Li, H. Zhang and C. Zhi, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA04532H

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