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The development of efficient and stable catalysts is of great importance for the elimination of volatile organic pollutants (VOCs). In this work, AuPdx nanoparticles (NPs) were loaded on TiO2 through the electrostatic adsorption approach to generate the yAuPd(x)/TiO2 (i.e., 0.35AuPd(0.46)/TiO2, 0.34AuPd(2.09)/TiO2, and 0.37AuPd(2.72)/TiO2; x and y are Pd/Au molar ratio and AuPdx loading, respectively; x = 0.46-2.72; and y = 0.34-0.37 wt%) catalysts, and their catalytic activities for the oxidation of ethyl acetate were determined. The results showed that the 0.37AuPd(2.72)/TiO2 sample exhibited the best activity (T-50% = 217 degrees C and T-90% = 239 degrees C at SV = 40,000 mL/(g h), E-a = 37 kJ/mol, specific reaction rate at 220 degrees C = 113.8 mu mol/(g(Pd) s), and turnover frequency (TOFNoble metal) at 220 degrees C = 109.7 x 10(-3) s(-1)). The high catalytic performance of the 0.37AuPd(2.72)/TiO2 sample was attributed to the good dispersion of AuPd2.72 NPs, the strong redox ability, the large ethyl acetate adsorption capacity, and the strong interaction between AuPdx and TiO2. Acetaldehyde, ethanol, and acetic acid are the main intermediates in the oxidation of ethyl acetate, and the loading of AuPdx NPs effectively reduces the formation of the toxic by-product acetaldehyde. The oxidation of ethyl acetate over the 0.34AuPd(2.09)/TiO2 sample might occur via the pathway of ethyl acetate -> ethanol -> acetic acid -> acetate -> CO2 and H2O. We believe that the obtained results may provide a useful idea for the design of bimetallic catalysts under industrial conditions and for understanding the VOCs oxidation mechanisms.
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CATALYSTS
Year: 2023
Issue: 4
Volume: 13
3 . 9 0 0
JCR@2022
ESI Discipline: CHEMISTRY;
ESI HC Threshold:20
Cited Count:
WoS CC Cited Count: 9
SCOPUS Cited Count: 9
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 4
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