Abstract
Identification of the catalytic active site is critical to designing and developing advanced heterogeneous catalysts. Many high-precision experimental techniques, as well as computational methods, have been developed to address this problem, but identifying the active site for composite oxide catalysts still remains a challenging task due to their complexity and indiscernible microstructures. Herein, we provided a key new insight into the active site of composite oxide catalysts by in-vestigating an iron-based oxide catalyst with complex components. The dopant atoms with octahedral coordination located at substitution-sites in the Fe2O3 lattice, tune the electronic structure of the adjacent iron atoms, which act as the essential active sites for the enhanced catalytic activity. This atomic-scale doping is different from the emerging single-atom catalyst concept, in which the single atom on the support is the active site, and which would provide an alternative methodology of improving activity of heterogeneous catalysts with maximized heteroatom efficiency.
Original language | English |
---|---|
Pages (from-to) | 1399-1404 |
Number of pages | 6 |
Journal | ACS Catalysis |
Volume | 8 |
Issue number | 2 |
Early online date | 3 Jan 2018 |
DOIs | |
Publication status | Published - 2018 |
Bibliographical note
This work was supported by National Natural Science Foundation of China (No. 21477046) and Key Technology R&D Program of Shandong Province (No. 2016ZDJS11A03).Keywords
- Heterogeneous catalyst
- composite oxide
- atomic-scale doping
- selective catalytic-reduction
- nitrogen oxides
- active site
- DFT calculation
- electronic state