Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8044197 | Vacuum | 2018 | 5 Pages |
Abstract
The activation process of a cobalt catalyst promoted with cerium compounds was examined. The reduction of precursor was performed in a High Pressure Cell (HPC), being a part of an ultra-high vacuum (UHV) system, at 500â¯Â°C under hydrogen atmosphere. X-ray photoelectron spectroscopy (XPS) was subsequently used to investigate the evolution of surface composition. High resolution X-ray photoelectron analysis confirms total reduction of cobalt oxide into Co metallic form. After exposure to hydrogen, Ce4+ ions prevail in the structure of cerium oxides identified on the surface.
Related Topics
Physical Sciences and Engineering
Materials Science
Surfaces, Coatings and Films
Authors
Adam Sarnecki, PaweÅ Adamski, Aleksander Albrecht, Agata Komorowska, Marlena Nadziejko, Dariusz MoszyÅski,