Understanding oxygen transfer on ceria with Pt single atoms for surface reaction.

ABSTRACT: Reducible metal oxides are widely used in surface reactions, primarily due to their ability to activate and transfer oxygen. Ceria, known for its rapid Ce³⁺/Ce⁴⁺ redox property, is well-known to follow Mars van Krevelen mechanism. In this study, we prepare Pt/CeO₂-Al₂O₃ catalysts with different ceria domain sizes of 3.7, 5.6, and 7.3 nm to understand oxygen transfer, mainly O₂ activation and lattice oxygen transfer. The ceria domains are isolated on the alumina, preventing oxygen transfer between the ceria. Pt single atomic structures are meticulously prepared to exclude O₂ activation on Pt nanoparticles and provide uniform active sites. Interestingly, the activity trend for CO oxidation is reversed in O₂

SUBMITTER: Choi Y 

PROVIDER: S-EPMC12789587 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature