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, the catalysts obtained by low-temperature exsolution show superior properties in terms of selectivity toward aldehydes in the hydroformylation of 1-hexene in the liquid phase. In addition, there is no Rh loss due to leaching, which is the main challenge for heterogeneous Rh catalysts used in liquid phase reactions. The exceptionally strong metal-support interaction imparts unique nanostructures and electronic properties to the exsolved metal nanoparticles, as revealed by electron energy loss spectroscopy (EELS) and diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy. The specific adsorption sites on the exsolved Rh particles lead to stronger metal-hydride and weaker metal-carbonyl bonds on the surface, steering the reaction pathway toward hydroformylation rather than olefin isomerization.
Delgado et al. (Mon,) studied this question.