NOx sorption-desorption by zirconia-based sorbent, Pt-ZrO2/Al2O3 has been investigated. Oxidation of NO to NO2 and to nitrate ions is an important role for Pt. At low temperatures below 200°C, the oxidation activity of Pt is insufficient. As the sorption temperature increased, the amount of NOx desorbing at higher temperatures increased in comparison with the low temperature desorption in TPD. The chemical state of stored NOx species should be changed by reaction temperatures.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry