Figure 18.

Schematic representation of the interaction of Pt atoms with pristine and oxygen plasma-treated CeO₂(111) films. Upon deposition on a stoichiometric CeO₂(111) surface, Pt forms small clusters which aggregate into larger Pt nanoparticles at elevated temperatures. Plasma pretreatment of the CeO₂ surface produces peroxo species and induces surface restructuring, resulting in small ceria nanoparticles, which act as anchoring sites either directly upon Pt adsorption or through surface migration of peroxo-stabilized Pt single atoms. Color code: Ce, gold; O, red; Pt, green; peroxo O₂^2–, pink. Reproduced with permission from ref (153). Copyright 2022 Wiley-VCH GmbH under CC-BY license (https://creativecommons.org/licenses/by/4.0/).