Issue 15, 2024

Manganese, nitrogen co-doped porous carbon with high-loading active sites as the oxygen reduction catalyst for Zn–air batteries

Abstract

Manganese–nitrogen–carbon (Mn–N–C) materials have been considered ideal catalysts for the oxygen reduction reaction (ORR). However, avoiding metal agglomeration during pyrolysis while ensuring the construction of Mn–Nx active centers is still difficult. Furthermore, the influence of pyrolysis temperature on structures of Mn–N–C is controversial, and needs an in-depth understanding. Herein, we prepare single atom Mn–N–C via a spatial confinement method. This is achieved through the pyrolysis of the ZIF precursor, where single Mn(acac)3 molecules are trapped within its cavities. Compared with 800 °C and 1000 °C, 900 °C is the optimal pyrolysis temperature for the synthesis of ZIF-derived Mn–N–C, which promotes the formation of the porous framework and dense Mn–Nx centers (27.47%). As a result, Mn–N–C-900 possesses an outstanding performance with a half-wave potential (E1/2) of 0.882 V in alkaline media. Impressively, the Zn–air battery using Mn–N–C-900 delivers a high peak power density of 84 mW cm−2.

Graphical abstract: Manganese, nitrogen co-doped porous carbon with high-loading active sites as the oxygen reduction catalyst for Zn–air batteries

Supplementary files

Article information

Article type
Paper
Submitted
09 Kho 2024
Accepted
20 Kho 2024
First published
21 Kho 2024

Sustainable Energy Fuels, 2024,8, 3290-3295

Manganese, nitrogen co-doped porous carbon with high-loading active sites as the oxygen reduction catalyst for Zn–air batteries

H. Xu, Y. Gao, R. Li, W. Sun, X. Lu, J. Bai and P. Yang, Sustainable Energy Fuels, 2024, 8, 3290 DOI: 10.1039/D4SE00771A

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