Enhancing low-temperature chlorobenzene oxidation over V2O5-WO3/TiO2 catalyst: the dual modulation of acidity and redox properties by Ru doping

Herein, Ru-doped V 2 O 5 -WO 3 /TiO 2 (VWTi) catalysts were prepared to study the impact of Ru doping on chlorobenzene (CB) oxidation activity. The introduction of Ru weakens the V–O bond strength, resulting in neutralizing the Lewis acid effect and optimizing the overall acid balance of the VWTi catalyst. Moreover, the presence of RuO 2 can significantly enhance the redox capability and surface lattice oxygen mobility. Hence, a significant improvement in both low-temperature activity and CO 2 selectivity has been achieved with the Ru-doped VWTi catalyst, reaching a CB conversion of 50% at 205 °C and a CO 2 selectivity of 73% at 400 °C for 0.50Ru-VWTi catalyst.