Defective zeolite TS-1 confined Pt nanoclusters with superior performance for CO and soot catalytic oxidation

Catalytic oxidation is an important reaction in the treatment of diesel exhaust. Herein, a facile self-assembly strategy has been developed to synthesize defective zeolite confined-catalyst Pt@TS-1 with ultra-low Pt loading, which shows super catalytic activity in the CO conversion (T90 = 175 degrees C) and soot oxidation (T90 = 490 degrees C). Owing to the confinement effect of zeolite, the obtained catalyst Pt@TS-1 exhibits a high percentage of Pt2+, smaller Pt nanoparticles and sufficient Ti3+-VO & BULL; defects, which can greatly accelerate the adsorption and conversion of CO, and the deep oxidation of soot. In-situ DRIFTS results demonstrate that rich and smaller Pt nanoparticles confined in zeolite may be responsible for excellent CO conversion. Significantly, the catalyst Pt@TS-1 also shows excellent catalytic stability and good resistance to water and sulfur, showing the potential for industrial applications.

Automated summary

A facile self-assembly strategy was developed to synthesize Pt@TS-1 catalyst with ultra-low Pt loading, which exhibits super catalytic activity and stability in CO conversion and soot oxidation. The confinement effect of zeolite leads to rich and smaller Pt nanoparticles, contributing to excellent CO conversion. The Pt@TS-1 catalyst also shows good resistance to water and sulfur, suggesting its potential for industrial applications.