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Enhancing the Oxygen Evolution Activity of Lead-Based Ceramic Anodes by Incorporating Active Oxides
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DOI：10.1007/s40831-026-01468-1.png)
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Abstract
En 中文
The overpotential of the oxygen evolution reaction (OER) accounts for the primary energy loss in the electrolytic metallurgical process of non-ferrous metals, and enhancing the catalytic performance of electrodes is an effective approach to address this issue. Herein, a series of active oxides (MnO2, SnO2, Ta2O5, Nb2O5, PbO2) from coated titanium anodes were incorporated into the lead-based anode via a powder compacting process to enhance the electrode's catalytic performance. The anodic behavior was systematically studied via various electrochemical methods. The results demonstrate that pure lead and its oxides suffer from poor catalytic activity for OER. However, the introduction of MnO2 and Nb2O5 could enhance the adsorption of intermediate products and reduce the charge transfer impedance in the electrochemical reaction process, thereby increasing the electrode's electrochemical performance. Notably, the Pb-MnO2 anode exhibited a potential reduction of 220 mV compared to the pure lead anode, demonstrating pronounced energy-saving effects. Furthermore, the evolution of film structure on the electrode surface was also investigated using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Results indicate that lead sulfate, lead dioxide, and active oxides coexist on the electrode surface after electrolysis and act as the reaction site between electrode and solution. Upon introducing active particles, this oxygen evolution layer becomes more compact, enhancing the electrode's stability.
Keywords:
Electrowinning
Oxygen evolution reaction
Catalytic particles
Lead-based anode
Journal
J
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3.2
Papers:
297
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2.8K
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