Journal
CHEMICAL ENGINEERING JOURNAL
Volume 404, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.126376
Keywords
Fenton-like process; Diatomic Fe-Co catalysts; Highly efficient catalyst; Dual-active sites; DFT calculations
Categories
Funding
- National Key R&D program of China [2019YFD1100202]
- National science and Technology Major Projects of Water Pollution Control and Treatment of China [2017ZX07202]
- Sichuan Science and Technology Program [2018JZ0010]
- National Key Basic Research Program of China [2017YFA0403402]
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A highly efficient Fenton-like catalyst based on isolated diatomic Fe-Co anchored on N-doped porous carbon was reported, showing outstanding catalytic activity for BPA degradation. The unique FeCoN6 configuration and pyrrolic N adsorption site contribute to the ultra-high catalytic performance of the diatomic Fe-Co catalyst in the heterogeneous activation of peroxymonosulfate.
The Fenton-like process provides a promising pathway to produce enormous reactive radicals for the elimination of refractory organic pollutants in environmental remediation. In the design of heterogeneous Fenton-like catalyst, significant progress has been made for nano- and micro-structures, but catalysts with atomic-scale active sites, particularly dual-metal single-atom, has been rarely observed. Herein, we report a highly efficient Fenton-like catalyst based on isolated diatomic Fe-Co anchored on N-doped porous carbon. This diatomic Fe-Co catalyst is robust and highly active in the heterogeneous activation of peroxymonosulfate (PMS) for BPA degradation, showing an outstanding turnover frequency exceeding 60.62 min(-1). A variety of analytical techniques and DFT results suggest that the unique N-coordinated diatomic Fe-Co (FeCoN6) serves as highly catalytically active sites in Fenton-like reaction, while the neighboring pyrrolic N act as adsorption site for the adsorption of target organic molecules. The ultra-high catalytic performance of diatomic Fe-Co catalysts can be ascribed to its fantastic isolated FeCoN6 configuration and pyrrolic N adsorption site, which greatly shorten the migration distance from reactive radical to the adsorbed organic molecules.
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