Hydrogen peroxide photosynthesis suffers from insufficient catalytic activity due to the high energy barrier of hydrogen extraction from H₂O. Herein, we report that mechanochemically synthesized keto-form anthraquinone covalent organic framework which is able to directly synthesize H₂O₂ (4784 μmol h⁻¹ g⁻¹ at λ > 400 nm) from oxygen and alkaline water (pH = 13) in the absence of any sacrificial reagents. The strong alkalinity resulted in the formation of OH^-(H₂O)_n clusters in water, which were adsorbed on keto moieties within the framework and then dissociated into O₂ and active hydrogen, because the energy barrier of hydrogen extraction was largely lowered. The produced hydrogen reacted with anthraquinone to generate anthrahydroquinone, which was subsequently oxidized by O₂ to produce H₂O₂. This study ultimately sheds light on the importance of hydrogen extraction from H₂O for H₂O₂ photosynthesis and demonstrates that H₂O₂ synthesis is achievable under alkaline conditions.

由于从H ₂ O中提取氢的高能垒，过氧化氢光合作用催化活性不足。在此，我们报道了机械化学合成的酮型蒽醌共价有机骨架，能够直接合成H ₂ O ₂ (4784 μmol h) ⁻¹ g ⁻¹ at λ > 400 nm)，在没有任何牺牲试剂的情况下，从氧气和碱性水 (pH = 13) 中获得。强碱性导致水中形成OH ^- (H ₂ O) _n簇，其被吸附在骨架内的酮部分上，然后解离成O ₂和活性氢，因为提氢的能垒大大降低。产生的氢气与蒽醌反应生成蒽氢醌，随后被O ₂氧化生成H ₂ O ₂ 。这项研究最终揭示了从H ₂ O 中提取氢对于H ₂ O ₂光合作用的重要性，并证明H ₂ O ₂合成在碱性条件下是可以实现的。