The supported catalyst of Pt-CeO₂/BEA with low loading amount (0.07 wt%) of Pt nanoparticles presented competitive performance towards catalytic ozonation of toluene. Characterization results demonstrated that the improved activity could be attributed to the enhanced Pt-CeO₂ strong metal-support interaction induced by the formation of much smaller, more uniform and dispersive Pt nanoparticles through the adsorption method. Furthermore, Pt/CeO₂ and Pt/SiO₂ were employed to elucidate the intrinsic reasons for the activity improvement. Various techniques such as XPS, Raman, O₂-TPD, etc. were performed to characterize the physicochemical properties. Results showed that the anchoring effect for Pt nanoparticles by the Pt-O-Ce bonds, greater amount of oxygen vacancies and more generated peroxide species are potentially responsible for the improvement of catalytic performance. In-situ Raman confirmed the participation of peroxide species in toluene oxidation, which were previously formed during the ozone decomposition. Plausible reaction pathways for the involving reactions on catalyst surface were also proposed.

负载量低 (0.07 wt%)的 Pt-CeO ₂ /BEA 负载型 Pt 纳米颗粒催化剂表现出对甲苯催化臭氧化的竞争性能。表征结果表明，提高的活性可归因于通过吸附方法形成更小、更均匀和分散的 Pt 纳米粒子，从而增强了 Pt-CeO ₂强金属-载体相互作用。此外，Pt/CeO ₂和Pt/SiO ₂被用来阐明活性提高的内在原因。各种技术，如XPS、拉曼、O ₂进行-TPD等以表征物理化学性质。结果表明，Pt-O-Ce 键对 Pt 纳米颗粒的锚定效应、更多的氧空位和更多产生的过氧化物物种可能是催化性能提高的原因。原位拉曼证实了过氧化物物质参与了甲苯氧化，这是先前在臭氧分解过程中形成的。还提出了涉及催化剂表面反应的合理反应途径。