机械化学
巴(单位)
氨
氨生产
催化作用
材料科学
环境压力
化学
无机化学
纳米技术
化学工程
有机化学
工程类
热力学
物理
气象学
作者
Gao‐Feng Han,Feng Li,Zhiwen Chen,Claude Coppex,Seok‐Jin Kim,Hyuk‐Jun Noh,Zhengping Fu,Yalin Lu,Chandra Veer Singh,Samira Siahrostami,Qing Jiang,Jong‐Beom Baek
标识
DOI:10.1038/s41565-020-00809-9
摘要
Ammonia, one of the most important synthetic feedstocks, is mainly produced by the Haber–Bosch process at 400–500 °C and above 100 bar. The process cannot be performed under ambient conditions for kinetic reasons. Here, we demonstrate that ammonia can be synthesized at 45 °C and 1 bar via a mechanochemical method using an iron-based catalyst. With this process the ammonia final concentration reached 82.5 vol%, which is higher than state-of-the-art ammonia synthesis under high temperature and pressure (25 vol%, 450 °C, 200 bar). The mechanochemically induced high defect density and violent impact on the iron catalyst were responsible for the mild synthesis conditions. The ammonia was synthesized under ambient conditions via a mechanochemical method, reaching a final concentration of 82.5 vol%.
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