Ce deposition on Rh has been studied over a range of conditions: at sufficiently high temperatures a stable surface alloy (Ce3Rh2) is formed at all Ce coverages. Oxidation and thermal treatment of Ce overlayers leads to agglomeration and the formation of cerium oxide crystallites on an essentially bare Rh surface. The chemisorption and reactive behaviour of this latter system towards carbon monoxide very closely mimics that of practical CeO2 Rh catalysts: CO2 is efficiently produced by oxygen spillover from the rare-earth oxide phase.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry