The portable electrochemical generation of hydrogen peroxide (H₂O₂) from air and water would enable greater utilization of this versatile green oxidant in applications ranging from environmental remediation to portable sanitation. Currently, electrochemical H₂O₂ synthesis is hampered by the lack of low-cost, non-toxic catalysts that selectively reduce O₂ to H₂O₂ and the lack of low-energy methods for separating the produced H₂O₂ from the electrolyte media. Herein, we show that a disulfonated anthraquinone can simultaneously catalyze the selective conversion of O₂ to H₂O₂ and shuttle between immiscible aqueous and organic phases via ion exchange. We exploit both of these properties in a flow system to assemble an all-Earth-abundant prototype device for the continuous generation and separation of H₂O₂ into an electrolyte-free water stream. The combination of molecular redox mediation and phase-transfer catalysis demonstrated here has broad implications for the electrochemical synthesis and isolation of value-added chemicals and fuels.

由空气和水中的便携式电化学生成过氧化氢（H ₂ O ₂），将使这种多功能绿色氧化剂在从环境修复到便携式卫生的各种应用中得到更大的利用。目前，电化学ħ ₂ ö ₂合成由缺乏低成本，无毒性的催化剂的选择性降低Ò阻碍₂至H ₂ ö ₂和用于分离缺少的低能量方法产生的H ₂ ö ₂从电解质介质。在这里，我们表明，二磺化蒽醌可以同时催化O ₂向H的选择性转化。₂ O ₂并通过离子交换在不混溶的水相和有机相之间穿梭。我们在流动系统中利用这两个特性，组装了一个全地球丰富的原型设备，用于将H ₂ O ₂连续生成和分离成无电解质的水流。此处证明的分子氧化还原介导和相转移催化的结合对增值化学品和燃料的电化学合成和分离具有广泛的意义。