Plasma‐Driven Nitrogen Fixation on Sodium Hydride

作者：Han Wu, Liang Yang, Jiaqi Wen, Yongfeng Xu, Yongli Cai, Wenbo Gao, Qianru Wang, Yeqin Guan, Sheng Feng, Hujun Cao, Teng He, Lin Liu, Shaoqian Zhang, Jianping Guo, Ping Chen · 发表于：Advanced Energy Materials · 年份：2023 · DOI：10.1002/aenm.202300722 · 被引用次数：31 · 研究领域：Ammonia Synthesis and Nitrogen Reduction、Hydrogen Storage and Materials、Caching and Content Delivery

Abstract The development of alternative approaches to the conventional Haber–Bosch ammonia synthesis process is an imperative but very challenging task. Extrinsic stimuli such as plasma could provide greater flexibility in materials selection and process innovation for nitrogen fixation. Hydride (hydrogen anion, H‾)‐containing materials have recently shown promise in thermal ammonia synthesis, whereas the interactions of hydrides and N 2 under plasma have rarely been investigated. Herein we explore plasma‐driven nitrogen fixation to NH 3 mediated by an inexpensive and common reagent sodium hydride, which does not react with N 2 under normal thermal conditions. Nitrogen plasma can produce reactive nitrogen species and also induce the dehydriding of NaH, which result in the activation and hydrogenation of N 2 to surface NaNH 2 species. The subsequent thermal‐hydrogenation of NaNH 2 produces NH 3 facilely. The stepwise chemical loop prevents ammonia from plasma‐induced cracking. This NaH‐mediated chemistry broadens the scope of hydrides as well as many other materials for N 2 fixation, and also has prospect for other chemical transformations.