The effect of different treatments on the surface characteristics of supported ruthenium catalysts has been investigated. It was established that not only at calcination followed by hydrogen treatment, but also at the reduction at 773 K, hydrogen is strongly bonded to the surface and incorporated into sub-surface layers. Repeated oxygen-hydrogen treatment removes this hydrogen and along with the disintegration of ruthenium particles the activity of catalysts is enhanced. On iron addition metallic iron is not formed. Nevertheless, the agglomeration of ruthenium particles is hindered at the preparation and the catalyst is stabilized by the presence of Fe2O3.
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry