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Jeong, Hu Young
UNIST Central Research Facilities (UCRF)
Research Interests
  • Soft material characterization such as graphene using a low kV Cs-corrected TEM

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Identifying the structure of Zn-N-2 active sites and structural activation

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Title
Identifying the structure of Zn-N-2 active sites and structural activation
Author
Li, FengBu, YunfeiHan, Gao-FengNoh, Hyuk-JunKim, Seok-JinAhmad, IshfaqLu, YalinZhang, PengJeong, Hu YoungFu, ZhengpingZhong, QinBaek, Jong-Beom
Issue Date
2019-06
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE COMMUNICATIONS, v.10, no.1, pp.2623
Abstract
Identification of active sites is one of the main obstacles to rational design of catalysts for diverse applications. Fundamental insight into the identification of the structure of active sites and structural contributions for catalytic performance are still lacking. Recently, X-ray absorption spectroscopy (XAS) and density functional theory (DFT) provide important tools to disclose the electronic, geometric and catalytic natures of active sites. Herein, we demonstrate the structural identification of Zn-N-2 active sites with both experimental/theoretical X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectra. Further DFT calculations reveal that the oxygen species activation on Zn-N-2 active sites is significantly enhanced, which can accelerate the reduction of oxygen with high selectivity, according well with the experimental results. This work highlights the identification and investigation of Zn-N-2 active sites, providing a regular principle to obtain deep insight into the nature of catalysts for various catalytic applications.
URI
https://scholarworks.unist.ac.kr/handle/201301/27028
URL
https://www.nature.com/articles/s41467-019-10622-1
DOI
10.1038/s41467-019-10622-1
ISSN
2041-1723
Appears in Collections:
UCRF_Journal Papers
ECHE_Journal Papers
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