Journal
CHEMICAL SCIENCE
Volume 7, Issue 9, Pages 5758-5764Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6sc02105k
Keywords
-
Categories
Funding
- National Science Foundation of China [21176235, 21203182, 21202163, 21303194, 21373206, 21476227, 21522608, 21503219]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17020100]
Ask authors/readers for more resources
Co-N-C catalysts are promising candidates for substituting platinum in electrocatalysis and organic transformations. The heterogeneity of the Co species resulting from high-temperature pyrolysis, however, encumbers the structural identification of active sites. Herein, we report a self-supporting Co-N-C catalyst wherein cobalt is dispersed exclusively as single atoms. By using sub-Angstrom-resolution HAADF-STEM in combination with XAFS and DFT calculation, the exact structure of the Co-N-C is identified to be CoN4C8-1-2O(2), where the Co center atom is coordinated with four pyridinic N atoms in the graphitic layer, while two oxygen molecules are weakly adsorbed on Co atoms in perpendicular to the Co-N-4 plane. This single-atom dispersed Co-N-C catalyst presents excellent performance for the chemoselective hydrogenation of nitroarenes to produce azo compounds under mild reaction conditions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available