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 3 2023
Accepted
02 6 2023
First published
03 6 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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