• search hit 7 of 10
Back to Result List

High temperature reduction and reoxidation of cerium oxide on Cu(111)

  • Cerium oxide is of great interest due to its technological importance in various electronic, optical and catalytic applications. The inverse model catalyst cerium oxide on Cu(111) shows a high activity for the production of methanol. Oxygen vacancies, e.g. in form of reduced ceria, are necessary for the production of methanol from CO2 and H2. The reduction of ceria may be achieved by exposure to H2 at elevated temperatures. We studied the interaction of H2 and CO2 with cerium oxide islands on a Cu(111) substrate with low-energy electron microscopy (LEEM) and x-ray absorption spectroscopy (XAS). From earlier studies, the orientation of the cerium oxide is known to be decisive for the catalytic activity. In our experiments, the impact of both orientations are directly compared via growth of (100) and (111) cerium oxide islands side by side. At temperatures around 550 °C, exposure to H2 leads to partial reduction and exposure to CO2 leads to complete reoxidation of the cerium oxide. The (100) and (111) orientations show differentCerium oxide is of great interest due to its technological importance in various electronic, optical and catalytic applications. The inverse model catalyst cerium oxide on Cu(111) shows a high activity for the production of methanol. Oxygen vacancies, e.g. in form of reduced ceria, are necessary for the production of methanol from CO2 and H2. The reduction of ceria may be achieved by exposure to H2 at elevated temperatures. We studied the interaction of H2 and CO2 with cerium oxide islands on a Cu(111) substrate with low-energy electron microscopy (LEEM) and x-ray absorption spectroscopy (XAS). From earlier studies, the orientation of the cerium oxide is known to be decisive for the catalytic activity. In our experiments, the impact of both orientations are directly compared via growth of (100) and (111) cerium oxide islands side by side. At temperatures around 550 °C, exposure to H2 leads to partial reduction and exposure to CO2 leads to complete reoxidation of the cerium oxide. The (100) and (111) orientations show different reduction and reoxidation behaviors.show moreshow less

Export metadata

Additional Services

Search Google Scholar
Metadaten
Author: Linus PleinesORCiD, Lars BußORCiD, Tevfik Onur MenteşORCiD, Francesca GenuzioORCiD, Andrea LocatelliORCiD, Jan Ingo FlegeORCiD, Jens FaltaORCiD
URL:https://www.dpg-verhandlungen.de/year/2021/conference/surfacescience/part/o/session/74/contribution/7
Title of the source (English):Verhandlungen der DPG - SurfaceScience21
Publisher:Deutsche Physikalische Gesellschaft e.V.
Place of publication:Bad Honnef
Document Type:Image (poster)
Language:English
Year of publication:2021
Tag:CO2 interaction; Cerium oxide; H2 interaction; Low-energy electron microscopy (LEEM); X-ray absorption spectroscopy (XAS)
Volume/Year:2021
Article number:O 74.7
Faculty/Chair:Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / FG Angewandte Physik und Halbleiterspektroskopie
Einverstanden ✔
Diese Webseite verwendet technisch erforderliche Session-Cookies. Durch die weitere Nutzung der Webseite stimmen Sie diesem zu. Unsere Datenschutzerklärung finden Sie hier.