A combined palladium-rhodium catalyst, generated by silica sol-gel-co-entrapment of metallic palladium and [Rh(cod) (μ-Cl)]2, catalyzes under ambient conditions the hydrogenation of toluene and other simple benzene derivatives. The catalyst is perfectly recyclable and promotes at 80°C and 400 psi, also the hydrogenation of polycyclic and sterically hindered arenes that are capable of penetrating the matrix pores. A synergistic effect is assumed to exist between the two metals, as either of the entrapped metallic components is a less active catalyst than the combination of both.
Bibliographical noteFunding Information:
We thank the German–Israeli Foundation for Scientific Research and Development (GIF), the Israel Science Foundation (founded by the Israel Academy of Science and Humanities) and the Infrastructure Fund, Tashtiot, provided by the Ministry of Science, Culture and Sport, for financial support of this study.
- Arene hydrogenation