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Baek, Jong-Beom
Center for Dimension-Controllable Organic Frameworks
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  • Covalent Organic Frameworks (COFs), Carbon Nanotubes(CNTs), graphene, Energy Conversion and Storage

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Mechanochemistry for ammonia synthesis under mild conditions

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Title
Mechanochemistry for ammonia synthesis under mild conditions
Author
Han, Gao-FengLi, FengChen, Zhi-WenCoppex, ClaudeKim, Seok-JinNoh, Hyuk-JunFu, ZhengpingLu, YalinSingh, Chandra VeerSiahrostami, SamiraJiang, QingBaek, Jong-Beom
Issue Date
2021-03
Publisher
NATURE RESEARCH
Citation
NATURE NANOTECHNOLOGY, v.16, no.3, pp.325 - 330
Abstract
The ammonia was synthesized under ambient conditions via a mechanochemical method, reaching a final concentration of 82.5 vol%. Ammonia, one of the most important synthetic feedstocks, is mainly produced by the Haber-Bosch process at 400-500 degrees 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 degrees 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 degrees C, 200 bar). The mechanochemically induced high defect density and violent impact on the iron catalyst were responsible for the mild synthesis conditions.
URI
https://scholarworks.unist.ac.kr/handle/201301/49487
URL
https://www.nature.com/articles/s41565-020-00809-9
DOI
10.1038/s41565-020-00809-9
ISSN
1748-3387
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ECHE_Journal Papers
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