Atomically dispersed zeolite-supported rhodium complex: Selective and stable catalyst for acetylene semi-hydrogenation
Künye
Kurtoğlu-Öztulum, Samira F., Zhao, Y., Hoffman, Adam S., Uzun, A., Demircan, O., Yordanli, Melisa S., Hong, J., Perez-Aguilar, Jorge E., Saltuk, A., Akgül, D., Ateşin, Tülay A., Aviyente, V., Gates, Bruce C., Bare, Simon R. (2024). Atomically dispersed zeolite-supported rhodium complex: Selective and stable catalyst for acetylene semi-hydrogenation. Journal of Catalysis, 429, 1-11.Özet
Supported rhodium catalysts are known to be unselective for semi-hydrogenation reactions. Here, by tuning the
electronic structure of supported mononuclear rhodium sites determined by the metal nuclearity and the
electron-donor properties of the support, we report that atomically dispersed HY zeolite-supported rhodium with
reactive acetylene ligands affords a stable ethylene selectivity > 90 % for acetylene semi-hydrogenation at 373 K
and atmospheric pressure, even when ethylene is present in a large excess over acetylene. Infrared and X-ray
absorption spectra and measurements of rates of the catalytic reaction complemented with calculations at the
level of density functional theory show how the catalyst performance depends on the electronic structure of the
rhodium, influenced by the support as a ligand that is a weak electron donor.
