Preparation of Titanium Foam-based SnO₂-Sb Electrode for Electrocatalytic Oxidation of Phenol

The titanium foam-based SnO 2 -Sb electrode has received more and more attention due to its high electrocatalytic activity, which is enabled by the unique porous structure of the titanium foam substrate. However, the electrode is constrained by the preparation method, exhibiting poor stability and a limited service life. An electrodeposition method was developed for preparing a high-efficiency, low-energy-consuming, and long-lasting foam titanium-based SnO 2 -Sb electrode, with the regulation of experimental parameters, including current density, counter electrode materials, and electrodeposition cycles. The results demonstrate that the prepared electrode coatings are well dispersed with improved grain refinement. The electrode surface exhibited multiple catalytically active sites and exhibited a low phenol decomposition potential (1.74 V). It achieved 98.39% phenol removal and 91.85% chemical oxygen demand removal within 180 min with high current efficiency (30.56%) and low reaction energy consumption of 0.13 kWh g −1 . The electrode life is extended when electrodeposition is performed twice, resulting in an actual service life of 1130.20 h. In conclusion, this study presents a novel approach to the fabrication of foamed titanium-based SnO 2 -Sb electrodes with high performance for the electrochemical oxidation process.