Activation of surface lattice oxygen in single-atom Pt/CeO 2 for low-temperature CO oxidation

Abstract

Stable catalysts through steaming: The lifetime of catalysts that convert automotive exhaust pollutants can be increased by lowering their operating temperature, which helps to prevent deactivation caused by the active metal atoms agglomerating into larger, less active particles. Nie et al. show that a thermally stable catalyst, atomically dispersed Pt ²⁺ on CeO ₂ , can become active for CO oxidation at 150°C after steam treatment at 750°C. In studies with simulated vehicle exhaust, this catalyst treatment also improves its oxidation activity for other exhaust components such as hydrocarbons. Science , this issue p. 1419