Low-temperature hydroformylation of ethylene by phosphorous stabilized Rh sites in a one-pot synthesized Rh-(O)-P-MFI zeolite.

ABSTRACT: Zeolites containing Rh single sites stabilized by phosphorous were prepared through a one-pot synthesis method and are shown to have superior activity and selectivity for ethylene hydroformylation at low temperature (50 °C). Catalytic activity is ascribed to confined Rh₂O₃ clusters in the zeolite which evolve under reaction conditions into single Rh³⁺ sites. These Rh³⁺ sites are effectively stabilized in a Rh-(O)-P structure by using tetraethylphosphonium hydroxide as a template, which generates in situ phosphate species after H₂ activation. In contrast to Rh₂O₃, confined Rh⁰ clusters appear less active in propanal production and ultimately transform into Rh(I)(CO)₂ under similar reaction con

SUBMITTER: Zhao M 

PROVIDER: S-EPMC10630368 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature