This study evaluated the feasibility of electrochemical hydrogen peroxide (H₂O₂) production with gas diffusion electrode (GDE) for decentralized water treatment. Carbon black-polytetrafluoroethylene GDEs were prepared and tested in a continuous flow electrochemical cell for H₂O₂ production from oxygen reduction. Results showed that because of the effective oxygen transfer in GDEs, the electrode maintained high apparent current efficiencies (ACEs,>80%) for H₂O₂ production over a wide current density range of 5–400 mA/cm², and H₂O₂ production rates as high as ∼202 mg/h/cm² could be obtained. Long-term stability test showed that the GDE maintained high ACEs (>85%) and low energy consumption (< 10 kWh/kg H₂O₂) for H₂O₂ production for 42 d (∼1000 h). However, the ACEs then decreased to ∼70% in the following 4 days because water flooding of GDE pores considerably impeded oxygen transport at the late stage of the trial. Based on an electrode lifetime of 46 days, the overall cost for H₂O₂ production was estimated to be ∼0.88 $/kg H₂O₂ including an electricity cost of 0.61 $/kg and an electrode capital cost of 0.27 $/kg. With a 9 cm² GDE and 40 mA/cm² current density, ∼2–4 mg/L of H₂O₂ could be produced on site for the electro-peroxone treatment of a 1.2 m³/d groundwater flow, which considerably enhanced ibuprofen abatement compared with ozonation alone (∼43%–59% vs. 7%). These findings suggest that electrochemical H₂O₂ production with GDEs holds great promise for the development of compact treatment technologies for decentralized water treatment at a household and community level.

这项研究评估了用气体扩散电极（GDE）生产电化学过氧化氢（H ₂ O ₂）用于分散水处理的可行性。制备了炭黑-聚四氟乙烯GDE，并在连续流式电化学池中测试了由氧气还原产生的H ₂ O ₂。结果表明，因为在的GDE的有效氧传递的，该电极保持高表观电流效率（ACES，> 80％）用于h ₂ ö ₂产量超过5-400毫安/厘米的宽电流密度范围内²，和H ₂ O _2的产生速率高达〜202 mg / h / cm ²可以获得。长期稳定性试验表明，GDE维持高的ACE（> 85％）和低的能量消耗（<10千瓦时/公斤ħ ₂ ö ₂）用于h ₂ ö ₂生产42 d（〜1000小时）。但是，在随后的4天中，ACEs降至约70％，因为在试验后期，GDE孔的注水大大阻碍了氧气的输送。根据46天的电极寿命，H ₂ O ₂生产的总成本估计为〜0.88 $ / kg H ₂ O _2，其中电力成本为0.61 $ / kg，电极资本成本为0.27 $ / kg 。使用9 cm ² GDE和40 mA / cm ²电流密度可以现场产生约2–4 mg / L的H ₂ O ₂，用于电过氧酮处理1.2 m ³ / d的地下水流，与仅进行臭氧氧化相比，布洛芬的减排效果显着增强（约43％– 59％和7％）。这些发现表明，用GDE生产电化学H ₂ O ₂对于家庭和社区一级的分散水处理紧凑型处理技术的发展具有广阔的前景。