Abstract
Adsorption of CO on the catalytic system K5[SiW11RhO39]/Al2O3 was studied by diffuse-reflectance IR spectroscopy. The electronic state of rhodium and thermal stability of the system in the redox cycles were studied. The oxidized heteropolycompound (HPC) contains the charged forms Rh+, Rh2+, and Rh3+. Their ratio strongly depends on the pre-treatment temperature of the sample. In the reduced HPC two main forms of rhodium exist: the ionic Rh+ and metallic Rh0. The supported HPC structure is stable in an oxidative medium at temperatures below ∼900 K. The properties of the K5[SiW11RhO39]/Al2O3 system are retained in the redox cycles up to ∼670 K, and the highly dispersed state of rhodium is observed up to 900 K.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
