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

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Dissociating stable nitrogen molecules under mild conditions by cyclic strain engineering

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Title
Dissociating stable nitrogen molecules under mild conditions by cyclic strain engineering
Author
Han, Gao-FengShi, Xiang-MeiKim, Seok-JinKim, JeonghunJeon, Jong-PilNoh, Hyuk-JunIm, Yoon-KwangLi, FengUhm, Young RangKim, Chul SungJiang, QingBaek, Jong-Beom
Issue Date
2019-11
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Citation
SCIENCE ADVANCES, v.5, no.11, pp.eaax8275
Abstract
All quiet on the nitrogen front. The dissociation of stable diatomic nitrogen molecules (N-2) is one of the most challenging tasks in the scientific community and currently requires both high pressure and high temperature. Here, we demonstrate that N-2 can be dissociated under mild conditions by cyclic strain engineering. The method can be performed at a critical reaction pressure of less than 1 bar, and the temperature of the reaction container is only 40 degrees C. When graphite was used as a dissociated N* receptor, the normalized loading of N to C reached as high as 16.3 at/at %. Such efficient nitrogen dissociation is induced by the cyclic loading and unloading mechanical strain, which has the effect of altering the binding energy of N, facilitating adsorption in the strain-free stage and desorption in the compressive strain stage. Our finding may lead to opportunities for the direct synthesis of N-containing compounds from N-2.
URI
https://scholarworks.unist.ac.kr/handle/201301/30710
URL
https://advances.sciencemag.org/content/5/11/eaax8275
DOI
10.1126/sciadv.aax8275
ISSN
2375-2548
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ECHE_Journal Papers
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