Wilkinson-type catalysts in ionic liquids for hydrogenation of small alkenes : understanding and improving catalyst stability

Title data

Kratzer, Eva M. ; Schötz, Simon ; Maisel, Sven ; Blaumeiser, Dominik ; Khan Antara, Sharmin ; Ewald, Leon ; Dotzel, Daniel ; Haumann, Marco ; Görling, Andreas ; Korth, Wolfgang ; Jess, Andreas ; Retzer, Tanja:
Wilkinson-type catalysts in ionic liquids for hydrogenation of small alkenes : understanding and improving catalyst stability.
In: Catalysis Science & Technology. Vol. 13 (2023) Issue 7 . - pp. 2053-2069.
ISSN 2044-4761
DOI: https://doi.org/10.1039/D2CY02058K

Official URL:

Abstract in another language

In this work, we apply supported ionic liquid phase (SILP) catalysts to hydrogenate 1-alkenes in a continuous fixed-bed reactor. SILP catalyts were prepared using the ionic liquid (IL) 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide C4C1ImNTf2 and tris(triphenylphosphine)rhodium(i) chloride RhCl(PPh3)3 as a dissolved catalyst. Under isothermal conditions{,} we observe an increase in activity related to restructuring of the catalyst via formation of supported metal nanoparticles (NPs). Combined in situ infrared spectroscopic and theoretical studies show that NP formation is a step-wise process including the sequential loss of ligands and formation of isolated{,} supported Rh+-ions as intermediates. To stabilize the highly selective homogeneous catalyst{,} we systematically vary the experimental conditions (co-feeding of CO) and catalyst design (application of strongly binding CO or chelating xantphos ligand). This knowledge-driven approach results in a stabilization of the molecular Rh complex under hydrogenation conditions.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Institutions of the University:	Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Chemical Engineering Faculties > Faculty of Engineering Science > Chair Chemical Engineering > Chair Chemical Engineering - Univ.-Prof. Dr.-Ing. Andreas Jess
Result of work at the UBT:	Yes
DDC Subjects:	500 Science > 540 Chemistry 600 Technology, medicine, applied sciences > 600 Technology 600 Technology, medicine, applied sciences > 620 Engineering 600 Technology, medicine, applied sciences > 660 Chemical engineering
Date Deposited:	05 May 2023 06:04
Last Modified:	05 May 2023 06:04
URI:	https://eref.uni-bayreuth.de/id/eprint/76196