H₂O₂ production is the decisive factor of Electro-Fenton performance on contaminants degradation. Herein, a novel but simple strategy was proposed for drastically enhanced H₂O₂ production from anodic O₂ electroreduction. H₂O₂ concentration at steady-state is 99.5% higher under pulsed current of “2sON + 2sOFF” than under constant current when using reticulated vitreous carbon foam (RVC foam) cathode. This was caused by the facilitated H₂O₂ diffusion from the porous cathode to bulk as H₂O₂ electroreduction pathway was weakened. Additionally, the enhancement effect is more significant for RVC foam with low PPI. This strategy is also applicable to graphite felt (GF) cathode, in which a 56.0% higher H₂O₂ concentration was observed at steady-state under pulsed current of “2sON + 2sOFF”. Investigation on pulse frequency shows there exists an optimal frequency that achieves both effective H₂O₂ electrogeneration and decreased H₂O₂ electroreduction.

H ₂ O _2的产生是电芬顿性能对污染物降解的决定性因素。在此，提出了一种新颖但简单的策略，用于通过阳极O ₂电还原显着增强H ₂ O _2的产生。使用网状玻璃状碳泡沫（RVC泡沫）阴极时，在“ 2sON + 2sOFF”的脉冲电流下，稳态下的H ₂ O ₂浓度比在恒定电流下高99.5％。这是造成促进ħ ₂ ö ₂从多孔阴极扩散到散装ħ ₂ ö ₂电还原途径被削弱。此外，对于低PPI的RVC泡沫，增强效果更为显着。此策略也适用于石墨毡（GF）阴极，其中在“ 2sON + 2sOFF”的脉冲电流下，在稳态下观察到的H ₂ O ₂浓度高56.0％。对脉冲频率的研究表明，存在一个既可以实现有效的H ₂ O ₂发电又可以减少H ₂ O _2的电还原的最佳频率。