摘要：SummaryExploring highly efficient and low-cost supported Pt catalysts is attractive for the application of volatile organic compounds (VOCs) combustion. Herein, efficient catalytic combustion of toluene at low temperature over Pt/γ-Al2O3catalysts has been demonstrated by tailoring active Pt species spatially. Pt/γ-Al2O3catalyst with low Pt-content (0.26 wt%) containing both interfacial Pt-Al(OH)xand surficial metallic Pt (Pt0) species exhibited super activity and water-resistant stability for toluene oxidation. The strong metal-support interaction located at the Al-OH-Pt interfaces elongated the Pt-O bond and contributed to the oxidation of toluene. Meanwhile, the OH group at the Al-OH-Pt interfaces had the strongest adsorption and activation capability for toluene and the derived intermediate species were subsequently oxidized by oxygen species activated by surficial Pt0to yield carbon dioxide and water. This work initiated an inspiring sight to the design of active Pt species for the VOCs combustion.Graphical abstractDisplay OmittedHighlights•Efficient catalytic combustion of toluene was realized at low temperature•The excellent water resistance was achieved over Pt-based catalyst•Roles of surficial Pt0and interfacial Pt-Al(OH)xspecies were identified•In situDRIFTS analysis revealed the reaction pathway of toluene combustionChemistry; Catalysis; Green chemistry; Materials science
