Identifying the structure of Zn-N2 active sites and structural activation

• Published in: Nature communications Vol. 10; no. 1; pp. 1 - 7
• Main Authors: Li, Feng, Bu, Yunfei, Han, Gao-Feng, Noh, Hyuk-Jun, Kim, Seok-Jin, Ahmad, Ishfaq, Lu, Yalin, Zhang, Peng, Jeong, Hu Young, Fu, Zhengping, Zhong, Qin, Baek, Jong-Beom
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 13.06.2019; Nature Publishing Group; Nature Portfolio
• Subjects: 639/301/299/886; 639/638/77/885; 639/638/77/886; Absorption spectroscopy; Activation; Catalysis; Catalysts; Density functional theory; Fine structure; Humanities and Social Sciences; Identification; multidisciplinary; Oxygen; Science; Science (multidisciplinary); Selectivity; Spectrum analysis; Ultrastructure; X ray absorption; X-ray absorption spectroscopy; Zinc
• ISSN: 2041-1723; 2041-1723
• DOI: 10.1038/s41467-019-10622-1

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. Identification of active sites is one of the main obstacles to rational design of catalysts for scientific and industrial applications. Here, the authors demonstrate the synthesis and structural identification of Zn based active sites, as well as the related structural activation for oxygen species.