Numerous studies have focused on tailoring materials for sorption-based atmospheric water harvesting (AWH) in arid climates, but both the design and modification of materials are a compromise for specific conditions and even sacrifice the nature of S-shaped isotherm. Inspired by the manipulation method of air humidity, we herein propose a regulation strategy of sorbent stepwise position by inducing an inner cooling source without changing the intrinsic properties of metal-organic framework (MOF). Significant improvement of water uptake of MIL-101(Cr) coating can be reached from 0.13 to 1.05 g/g with the cooling temperature of 14°C in typical arid climate (25°C and 30% relative humidity [RH]). Mechanism of stepwise position migration is elucidated and performance of AWH device based on Peltier cooler is enhanced as compared to that without regulation. This study weakens the limitation of the exclusive tailoring materials for specific conditions and would provide a promising perspective for next-generation scalable and variable weather-adaptive AWH systems.

许多研究都集中在为干旱气候下基于吸附的大气集水 (AWH) 定制材料，但材料的设计和修改都是针对特定条件的妥协，甚至牺牲了 S 形等温线的性质。受空气湿度操纵方法的启发，我们在此提出了一种通过引入内部冷却源而不改变金属有机框架 (MOF) 的固有特性来逐步调节吸附剂位置的策略。在典型的干旱气候（25°C 和 30% 相对湿度 [RH]）下，冷却温度为 14°C，MIL-101(Cr) 涂层的吸水率可显着提高 0.13 至 1.05 g/g。阐明了逐步位置偏移的机制，并且与没有调节的AWH装置相比，基于Peltier冷却器的AWH装置的性能得到了提高。这项研究削弱了针对特定条件的独家剪裁材料的局限性，并将为下一代可扩展和可变天气自适应 AWH 系统提供一个有前景的前景。