In general, the electro-Fenton degradation potential is set according to the optimal H₂O₂ generation potential without considering Fe²⁺/Fe³⁺ electrocatalytic recycling, resulting in high-energy consumption and iron sludge. In this work, a novel double-potential strategy was provided by alternately applying the optimal H₂O₂ generation potential and Fe²⁺/Fe³⁺ recycling potential during the degradation process. The double-potential method showed a coordination of in-situ H₂O₂ generation by oxygen reduction reaction (ORR) and Fe²⁺/Fe³⁺ recycling. EPR detection indicated that more hydroxyl radicals were produced during the double-potential process compared with the one achieved by constant potential. An outstanding DMP mineralization rate of 94.0% was achieved within 30 min and corresponding energy consumption was 0.762 × 10⁴ kJ kg TOC⁻¹ while the constant potential method reached 73.4% at −0.5 V and corresponding energy consumption was 1.54 × 10⁴ kJ kg TOC⁻¹.

通常，在不考虑Fe ²⁺ / Fe ³⁺电催化循环的情况下，根据最佳的H ₂ O ₂产生电势来设置Fenton电降解电势，导致高能耗和铁污泥。在这项工作中，通过在降解过程中交替应用最佳H ₂ O ₂生成电势和Fe ²⁺ / Fe ³⁺循环电势，提供了一种新颖的双电势策略。双电位法显示通过氧还原反应（ORR）和Fe ²⁺ / Fe原位生成H ₂ O ₂³⁺回收。EPR检测表明，与通过恒定电势获得的羟基自由基相比，在双电势过程中产生了更多的羟基自由基。30分钟内达到了出色的DMP矿化率94.0％，相应的能耗为0.762×10 ⁴  kJ kg TOC ^-1，而恒电位法在-0.5 V时达到73.4％，相应的能耗为1.54×10 ⁴  kJ kg TOC ^-1。