Ceria enables oxygen transfer, but size effects complicate design. Here the authors build Pt/CeO2-Al2O3 with isolated CeO2 domains (3.7–7.3 nm) and Pt single atoms, showing small domains favor O2 activation, larger ones lattice-O transfer, guiding CO or methane oxidation.
- Yunji Choi
- Seokhyun Choung
- Hyunjoo Lee