Sintering behaviors of the Pt particles of Pt/Al2O3 catalyst prepared using different preparation methods (microemulsion, sol-gel, and impregnation methods) were investigated. It was found that the catalyst prepared by microemulsion had a higher resistance to sintering than did the sol-gel and impregnation catalysts. To limit the sintering even more, the catalysts were pressed. The resistance to sintering in all the catalysts was improved by pressing. The pressed microemulsion catalyst was little deactivated in the NO-CO reaction by thermal treatment at 700 °C for 12 h, and had a high activity relative to that of the sol-gel and impregnation catalysts.
All Science Journal Classification (ASJC) codes
- Process Chemistry and Technology