Removal of toluene over bi-metallic Pt–Pd-SBA-15 catalysts: Kinetic and mechanistic study

Abstract A series of bi-metallic Pt–Pd-SBA-15 catalysts which promoted the dispersion of Pt–Pd by surface functionalization of SBA-15 were prepared and applied for toluene oxidation. We found that PVP-assisted Pt–Pd-SBA-15 exhibited the minimal average particle size (4.6 nm) and the highest Pt0/Ptn+ (50.6%) among the all catalysts decorated with polyvinylpyrrolidon (PVP), citric acid and ethylenediamine, respectively. Kinetic study revealed that the Ea of all catalysts decreased accompanied with catalytic activity in the following order: Pt–Pd-SBA-15-PVP (83.5 kJ/mol)