Steering Pt Cluster Dimensionality via the Surface Oxidation State of CeO₂(111) Thin Films.

ABSTRACT: Ceria has recently regained attention in catalysis research, thanks to its ability to reversibly form and redisperse supported, catalytically active Pt clusters through control of its surface morphology and oxidation state. In the present article, we systematically and independently tune these parameters during CeO₂(111) film synthesis to investigate their influence on the dimensionality (2D vs 3D) and sintering behavior of size-selected Pt₂₀ clusters. We present recipes for atomically flat CeO₂(111) islands and closed films with a thickness of up to 18 monolayers, grown on Rh(111), and characterize them by means of scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and low-energy electron diffraction (LEED

SUBMITTER: Reich J 

PROVIDER: S-EPMC12603995 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature