Stability of Iridium Single Atoms on Fe₃O₄(001) in the mbar Pressure Range.

ABSTRACT: Stable single metal adatoms on oxide surfaces are of great interest for future applications in the field of catalysis. We studied iridium single atoms (Ir₁) supported on a Fe₃O₄(001) single crystal, a model system previously only studied in ultra-high vacuum, to explore their behavior upon exposure to several gases in the millibar range (up to 20 mbar) utilizing ambient-pressure X-ray photoelectron spectroscopy. The Ir₁ single adatoms appear stable upon exposure to a variety of common gases at room temperature, including oxygen (O₂), hydrogen (H₂), nitrogen (N₂), carbon monoxide (CO), argon (Ar), and water vapor. Changes in the Ir 4f binding energy suggest that Ir₁ interacts not only with adsorbed and d

SUBMITTER: Comini N 

PROVIDER: S-EPMC10544020 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature