Solar photocatalysis has emerged as a sustainable route to produce H₂O₂; however, the structural design of photocatalysts makes them expensive, limiting their practical applications. Inspired by the industrial anthraquinone process, we developed a new reaction design for solar H₂O₂ production using an organic working solution (OWS) comprising aryl alcohols and a metal-free polymeric photocatalyst. The synergistic auto- and photocatalytic oxidation of aryl alcohols in the OWS allowed for the quantitative generation of H₂O₂ by counter O₂ reduction. The fine modulation of the OWS with water enhanced the photocatalytic route, resulting in an unprecedented H₂O₂ production rate of 46.9 mmol h⁻¹ g⁻¹ with a solar-to-chemical conversion efficiency of 1.1% under simulated sunlight. Pure H₂O₂ was obtained after extraction and purification by membrane filtration, and was directly used in large-scale water purification as a proof of concept. This study demonstrates the importance of reaction design in photocatalytic applications and will promote future advancements in green, solar-driven H₂O₂ production.

中文翻译：

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在微调反应介质中通过协同自动和光催化氧化太阳能驱动的 H2O2 生产

太阳能光催化已成为生产 H ₂ O ₂的可持续途径；然而，光催化剂的结构设计使其价格昂贵，限制了它们的实际应用。受工业蒽醌工艺的启发，我们开发了一种新的太阳能 H ₂ O ₂生产反应设计，使用包含芳基醇和无金属聚合物光催化剂的有机工作溶液 (OWS)。OWS 中芳基醇的协同自催化和光催化氧化允许通过反向 O ₂还原定量生成 H ₂ O _{2 。}用水对 OWS 进行精细调制增强了光催化途径，从而产生了前所未有的 H_{在模拟阳光下， 2} O ₂的产生率为 46.9 mmol h ^-1 g ^-1，太阳能化学转化效率为 1.1%。纯H ₂ O ₂经膜过滤提取纯化后得到，作为概念验证直接用于大规模净水。这项研究证明了反应设计在光催化应用中的重要性，并将促进未来绿色、太阳能驱动的 H ₂ O ₂生产的进步。