Issue 14, 2023

Construction of MWNT supported ultra-small Ag@MnO2 nanoparticles for the ORR and Al–air batteries

Abstract

The development of non-platinum catalysts for high efficiency oxygen reduction reaction (ORR) is one of the research hotspots of fuel cells and metal air cells. In this work, a low-cost Ag@MnO2/MWNT catalyst for Al–air batteries was synthesized in one step by using tetrakis(hydroxylmethyl)phosphonium chloride (THPC) as a reducing agent. Ag was attached to the surface of MnO2 to form Ag@MnO2 nanoparticles with an average particle size of 4.88 nm, which were uniformly deposited on MWNTs. The Ag@MnO2/MWNT catalyst has a low Ag load (10.03 wt%) and shows excellent ORR activity, electrochemical stability and methanol tolerance compared with the 20 wt% Pt/C catalyst. The discharge voltage, specific capacity (1240 mA h g−1), the power density (140.2 mW cm−2) and stability of the Al–air battery using Ag@MnO2/MWNTs as the cathode are equivalent to those of a battery using 20 wt% Pt/C.

Graphical abstract: Construction of MWNT supported ultra-small Ag@MnO2 nanoparticles for the ORR and Al–air batteries

Supplementary files

Article information

Article type
Paper
Submitted
14 Kul 2023
Accepted
02 Kho 2023
First published
03 Kho 2023

Sustainable Energy Fuels, 2023,7, 3276-3283

Construction of MWNT supported ultra-small Ag@MnO2 nanoparticles for the ORR and Al–air batteries

Y. Zhang, L. Yin, Z. Luo, X. Zhuge, P. Wei, Z. Song and K. Luo, Sustainable Energy Fuels, 2023, 7, 3276 DOI: 10.1039/D3SE00337J

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