Photocatalytic hydrogen evolution from water vapor presents a novel approach to solar energy conversion. Nevertheless, the design and synthesis of water-adsorbing photocatalysts is exceedingly challenging. In this report, we for the first time present three hygroscopic one-dimensional (1D) covalent organic frameworks (COFs) based on photosensitive pyrene (Py-MPA, Py-PDCA, and Py-HMPA) combined with atmospheric water harvesting (AWH) and photocatalysis for photocatalytic water vapor splitting. Due to the ultra-small pores of the 1D structure, with hydrophilic -OH sites satisfying the microporous filling of water molecules, Py-HMPA demonstrated superior water adsorption capacity at lower humidity. Remarkably, Py-HMPA exhibited an impressive H₂ production rate of 105 μmol g⁻¹ h⁻¹ and high stability during solid-state photocatalysis utilizing water vapor. Overall, this work paves a new pathway of organic porous materials for photocatalytic water vapor splitting.

从水蒸气中光催化析氢提出了一种太阳能转换的新方法。然而，吸水光催化剂的设计和合成极具挑战性。在本报告中，我们首次提出了三种基于光敏芘（Py-MPA、Py-PDCA和Py-HMPA）结合大气水收集（AWH）的吸湿性一维（1D）共价有机框架（COF）以及光催化水蒸气分解的光催化。由于一维结构的超小孔隙，亲水性-OH位点满足水分子的微孔填充，Py-HMPA在较低湿度下表现出优异的吸水能力。值得注意的是，Py-HMPA 表现出令人印象深刻的105 μmol g ^-1 h的 H ₂生产率^-1，并且在利用水蒸气的固态光催化过程中具有高稳定性。总的来说，这项工作为有机多孔材料光催化水蒸气分解开辟了一条新途径。