A Multitechnique Study of C₂H₄ Adsorption on Fe₃O₄(001).

ABSTRACT: The adsorption/desorption of ethene (C₂H₄), also commonly known as ethylene, on Fe₃O₄(001) was studied under ultrahigh vacuum conditions using temperature-programmed desorption (TPD), scanning tunneling microscopy, X-ray photoelectron spectroscopy, and density functional theory (DFT)-based computations. To interpret the TPD data, we have employed a new analysis method based on equilibrium thermodynamics. C₂H₄ adsorbs intact at all coverages and interacts most strongly with surface defects such as antiphase domain boundaries and Fe adatoms. On the regular surface, C₂H₄ binds atop surface Fe sites up to a coverage of 2 molecules per (√2 × √2)R45° unit cell, with every second Fe occupied. A desorption ener

SUBMITTER: Puntscher L 

PROVIDER: S-EPMC10518864 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature