The generation of sludge is the main issue in iron-based electrochemical techniques. Interestingly, in this study, the effluent was totally limpid and iron sludge did not generate when dissolved silicate (Na₂SiO₃) was used as the electrolyte in an electrolysis catalyzed ozone (ECO-Na₂SiO₃) system. More importantly, the pseudo-first-order rate constants (0.112 min⁻¹) for DMAC degradation in ECO-Na₂SiO₃ process was much higher than those of ECO systems using other electrolytes. An inhibition film formed on the iron electrode surface was identified to inhibit excess corrosion of iron electrodes and efficiently catalyze decomposition of ozone simultaneously. It was confirmed that hydroxyl radical (^•OH) played a dominant role for the degradation of DMAC, and O₂^•− and H₂O₂ were also contained in ECO-Na₂SiO₃ system. The contributions of contained oxidative reactions in ECO-Na₂SiO₃ system were quantitatively evaluated. Finally, the degradation pathway of DMAC was proposed. This work provides an effective way for protecting electrode from corrosion in electrochemical process.

污泥的产生是铁基电化学技术的主要问题。有趣的是，在这项研究中，当将溶解的硅酸盐（Na ₂ SiO ₃）用作电解催化臭氧（ECO-Na ₂ SiO ₃）系统中的电解质时，废水完全清澈且不产生铁淤渣。更重要的是，在ECO-Na ₂ SiO _3中降解DMAC的拟一级反应速率常数（0.112 min ^-1）处理过程远高于使用其他电解质的ECO系统。识别出在铁电极表面上形成的抑制膜，以抑制铁电极的过度腐蚀并有效地同时催化臭氧的分解。可以确认，羟基自由基（^• OH）在DMAC的降解中起主要作用，并且ECO-Na ₂ SiO ₃体系中还包含O ₂ ^•-和H ₂ O ₂。ECO-Na ₂ SiO ₃中所含氧化反应的贡献系统进行了定量评估。最后，提出了DMAC的降解途径。这项工作提供了一种在电化学过程中保护电极免受腐蚀的有效方法。