Journal
MOLECULAR CATALYSIS
Volume 523, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mcat.2021.111545
Keywords
Glycerol; Oxidation; Base-free; Hexagonal; WO3 ???????; WO3 ???????
Categories
Funding
- National Natural Science Foundation of China [21773206, 21473155]
- Natural Science Foundation of Zhejiang Province [L12B03001]
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In this study, Pt catalysts supported on different shaped WO3 (rod-like, lamellar and cuboid) were prepared and tested for the selective oxidation of glycerol in base-free aqueous solution. The Pt/R-WO3 catalyst with rod-like WO3 support showed higher surface area and activity, as well as enhanced selectivity towards glyceric acid.
In this work, different shaped WO3 (rod-like, lamellar and cuboid) supported Pt catalysts were prepared in a facile routine and tested in the selective oxidation of glycerol in base-free aqueous solution. Characterizations indicated that rod-like WO3 supported Pt catalyst (Pt/R-WO3) possesses higher surface area because of the formation of vertical pore channels and highly exposed plane (100), the deposited Pt atoms combined strongly with the terminal -W=O in rod-like WO3. These properties promoted the adsorption, storage and surface diffusion of oxygen over Pt/R-WO3 which exhibited the excellent activity for the selective oxidation of glycerol. And the higher amount of acid sites on the surface of Pt/R-WO3 enhanced the selectivity of glyceric acid. The calculated turnover frequency of each Pt atom in Pt/R-WO3 reached 946 h(-1) at 60 ?C.
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