Enhancement effect of Pt modification on CeO2 on catalytic ozonation of toluene [Pt颗粒负载对CeO2臭氧催化氧化甲苯的增强作用]

作者：Wang J.; Mao M.; Shi X.; Li H.; Huang H.; Fu M.; Chen L.; Ye D.; Wu J.^*

来源：Acta Scientiae Circumstantiae, 2020, 40(5): 1629-1639.

DOI：10.13671/j.hjkxxb.2020.0082

• Oxygen vacancy
• Ozone catalytic oxidation
• Peroxide species
• Pt/CeO2
• Toluene

The Pt/CeO2 catalyst was synthesized via platinum particle adsorption method and its enhanced performance was compared with CeO2 during catalytic oxidation of toluene by ozone. The catalysts were characterized by hydrogen temperature programmed reduction (H2-TPR), oxygen temperature programmed desorption (O2-TPD), X-ray photoelectron spectroscopy (XPS) and Raman. The results showed that the strong interaction between Pt and CeO2 increased the amount of oxygen vacancy in CeO2. Compared with CeO2, Pt/CeO2 exhibited higher catalytic activity towards both toluene ozonation and ozone decomposition. The toluene removal, CO2 yield and ozone decomposition of Pt/CeO2 reached 92.3%, 92.1% and 99.9% at 80℃, respectively. In situ Raman was used for further studying the species and content of oxygen species generated from ozone decomposition and their evolution with or without toluene. The loading of Pt particles on CeO2 can promote ozone decomposition to produce more active peroxide species, and thus greatly improve the performance of catalytic ozonation of toluene.

• 单位
  华南理工大学