The ammonia (NH₃) emitting into the atmosphere during the industrial process of synthesizing ammonia not only constitutes serious air pollution, but also causes a waste of ammonia resources. Therefore, there is an urgent need to develop efficient ammonia capture technology. In this work, we report an efficient capture of NH₃ by protic amino-2-propanol hydrochloride-based deep eutectic solvents (DESs). These DESs with multiple hydrogen bond sites exhibit remarkable NH₃ uptake with up to 0.244 g NH₃ per g DES at 293 K and 1 bar and good recyclability. Further mechanism study suggested that the introduction of hydrogen bond donors with rich hydroxyl groups provides a large number of hydrogen bond sites to achieve efficient absorption of NH₃ through the intermolecular hydrogen bonds interaction. This research has obtained an alternative absorber for the capture of NH₃, and it also provides ideas for the design of high-efficiency NH₃ deep eutectic solvents absorbent.

合成氨工业过程中向大气排放的氨(NH _{3 )不仅构成严重的空气污染，而且造成氨资源的浪费。}因此，迫切需要开发高效的氨捕获技术。在这项工作中，我们报告了通过质子氨基-2-丙醇盐酸盐基低共熔溶剂(DES)有效捕获 NH _{3 。}这些具有多个氢键位点的 DES 表现出显着的 NH _{3吸收能力}，在 293 K 和 1 bar 下每克 DES 吸收高达 0.244 g NH _{3 ，并且具有良好的可回收性}。进一步的机理研究表明，引入具有丰富羟基的氢键供体提供了大量的氢键位点，通过分子间氢键相互作用实现NH _{3的高效吸收。}本研究获得了一种捕获NH ₃的替代吸收剂，也为高效NH ₃低共熔溶剂吸收剂的设计提供了思路。