Issue 30, 2025

Manganese MOF-derived ruthenium-doped MnxOy catalyst for enhanced oxygen evolution reaction and energy-efficient lead recovery

Abstract

Advanced, efficient, and eco-friendly technologies are essential for the safe recycling of spent lead-acid batteries for minimizing their environmental impact by mitigating toxic wastes and promoting resource sustainability by recovering valuable lead. Herein, we proposed a simple, zero-emission electrochemical strategy to recover metallic lead via the direct electrolysis of lead-acid batteries. MnxOy@RuO2 with a layered structure of stacked nanosheets was prepared via facile hydrothermal and annealing methods. MnxOy@RuO2 exhibited low overpotentials of 175 mV and 248 mV at a current density of 10 mA cm−2 in 0.5 mol L−1 H2SO4 and Pb(MSA)2, respectively, showcasing its excellent OER activity. Notably, the catalyst exhibited excellent stability for over 10 hours. The MnxOy@RuO2 catalyst during constant current electrolysis required an overpotential of only 375.6 mV at 25 mA cm−2 to function, greatly reducing the precipitation of PbO2. MnxOy@RuO2 facilitated high-efficiency oxygen evolution reaction using the lead MSA electrolyte, suppressing the PbO2 formation and reducing the anode overpotential, making it an ideal anode material for energy-efficient lead recovery.

Graphical abstract: Manganese MOF-derived ruthenium-doped MnxOy catalyst for enhanced oxygen evolution reaction and energy-efficient lead recovery

Supplementary files

Article information

Article type
Paper
Submitted
12 May 2025
Accepted
01 Jul 2025
First published
14 Jul 2025

Dalton Trans., 2025,54, 11621-11631

Manganese MOF-derived ruthenium-doped MnxOy catalyst for enhanced oxygen evolution reaction and energy-efficient lead recovery

X. Wang, R. Andavar, J. Xie, W. Liu, Y. Sun, Y. Chen, Y. Tang, P. Wan and J. Pan, Dalton Trans., 2025, 54, 11621 DOI: 10.1039/D5DT01109D

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