• • Sn-Sb co-doped Ti/SnO2 electrode (Sn:Sb=9:1) exhibited a higher oxygen evolution potential (OEP) and larger electrochemically active surface area, with charge transfer resistance (Rct) significantly reduced compared to single-doped electrodes, enhancing current efficiency and stability for EAOPs.
• • Under identical conditions (20 mA·cm−2, pH=5, 0.1 mol·L−1 Na2SO4), the co-doped electrode achieved phenol and TOC removal rates and apparent rate constants superior to single-doped electrodes, with the lowest specific energy consumption per unit TOC removal, indicating cost-effective mineralization.
• • Radical quenching experiments confirmed ·OH as the dominant reactive species; degradation pathway includes aromatic ring hydroxylation, ring opening, and mineralization to short-chain carboxylic acids, ensuring complete detoxification.
• • Sn-Sb co-doping increased surface adsorbed oxygen (O_ads) and defect site density, which are critical for ·OH generation, thereby improving the electrode's electrocatalytic activity and service life, addressing the bottleneck of coating delamination in conventional Ti/SnO2-Sb anodes.