Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 275, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119134
Keywords
Deep eutectic solvents; Polyoxometalate; Oxidation desulfurization; Biomimetics
Funding
- National Natural Science Foundation of China (NSFC) [21676230, 21373177]
- Natural Science Foundation of Shandong Province [ZR2018BB004]
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Construction of biomimetic catalytic systems is recognized as one of the most prospective, but is challenging approaches to achieve efficient aerobic oxidative transformations. Herein, a green aerobic oxidative desulfurization (AODS) biomimetic system was designed, which combined an Anderson polyoxometalate (POM)-based ionic liquid (IL) with deep eutectic solvent (DES). The 3-(pyridine-1-ium-1-yl) propane-1-sulfonate](3) Co(OH)(6)Mo6O18 {abbreviate as [PyPS](3)Co(OH)(6)Mo6O18} combined high catalytic activity and stability with perfect synthetic availability on the desulfurization of diesel. Also, excellent recoverability showing little decrease in activity after 5 cycles has aroused the great interest. Cyclic voltammogram measurement shows conclusive evidence of oxygen activation with a 17-fold current density increase, further confirming the reduction of the aerobic oxidation reaction barrier. It revealed the biomimetic oxygen activation and synergistic electron transfers mechanism for ODS, which may provide a new insight into the construction of biomimetic system in the future.
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