Evolution of the active species of homogeneous Ru hydrodeoxygenation catalysts in ionic liquids.

ABSTRACT: This work establishes structure-property relationships in Ru-based catalytic systems for selective hydrodeoxygenation of ketones to alkenes by combining extensive catalytic testing, in situ X-ray absorption spectroscopy (XAS) under high pressures and temperatures and ex situ XAS structural characterization supported by density functional theory (DFT) calculations. Catalytic tests revealed the difference in hydrogenation selectivity for ketones (exemplified by acetone) or alkenes (exemplified by propene) upon changing the reaction conditions, more specifically in the presence of CO during a pretreatment step. XAS data demonstrated the evolution of the local ruthenium structure with different amounts of Cl/Br and CO ligands. In addition, in the absence of CO, the catalyst was r

SUBMITTER: Janssens K 

PROVIDER: S-EPMC9473539 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature