Abstract
A novel family of hybrid catalyst with high turnover frequency (TOF) and high selectivity towards aldehydes for hydroformylation of olefins could be successfully approached through direct coordination with the PPh 3 ligand to the highly dispersed Rh metal particle precursors. A further advantage is that the catalyst is easily prepared and recyclable. The results revealed that hydroformylation of olefins to aldehydes dominantly took place on the surface of PPh 3 ligand modified Rh metal particles of the hybrid catalyst. It was found that the formation of chemical coordination bond between the Rh metal particles and the lone-pair electron of PPh 3 was evident through the TG and 31P NMR measurement. Moreover, the addition of PPh 3 onto the Rh/SiO 2 exert a significant influence on the adsorption state of reactant CO, H 2 and C 2H 4 on the PPh 3–Rh/SiO 2 sample, which probably lead to good catalytic performances for hydroformylation of olefins.
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