Revealing the Nature of Active Oxygen Species and Reaction Mechanism of Ethylene Epoxidation by Supported Ag/α-Al₂O₃ Catalysts.

ABSTRACT: The oxygen species on Ag catalysts and reaction mechanisms for ethylene epoxidation and ethylene combustion continue to be debated in the literature despite decades of investigation. Fundamental details of ethylene oxidation by supported Ag/α-Al₂O₃ catalysts were revealed with the application of high-angle annular dark-field-scanning transmission electron microscopy-energy-dispersive X-ray spectroscopy (HAADF-STEM-EDS), in situ techniques (Raman, UV-vis, X-ray diffraction (XRD), HS-LEIS), chemical probes (C₂H₄-TPSR and C₂H₄ + O₂-TPSR), and steady-state ethylene oxidation and SSITKA (¹⁶O₂ → ¹⁸O₂ switch) studies. The Ag nanoparticles are found to carry a considerabl

SUBMITTER: Pu T 

PROVIDER: S-EPMC10775145 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature