Abstract
Volatile organic compounds (VOCs) have become a type of tricky gaseous contaminant in modern industry. Catalytic oxidation is believed to be an effective way to remove VOCs in low concentration. A series of Pt-supported CeaTiOx with hierarchical tubular-like structure assembled by flakes was prepared and applied in catalytic toluene oxidation. Pt/Ce0.15TiOx with low Ce amount showed enhanced catalytic performance (T50 = 147 ℃ and T90 = 162 ℃) and good durability in long-term use, recycling use and water resistance. Various characterizations were used to investigate the influence of Ce addition on activity. In situ DRIFTS of toluene oxidation disclosed that Ce addition boosted the oxidation process at lower temperature where surface adsorb oxygen plays a vital role. The appropriate Ce addition was proved to be benefit for Pt dispersion, formation of more Pt0 species that were derived from metal-support interaction (MSI) between Pt and Ce0.15TiOx, which comprehensively attributed to its excellent performance.
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