| 초록 |
Beyond the maximized atomic efficiencies, atomically dispersed catalysts have attracted great attention in recent years due to the uniform active sites and careful regulation over local environments of them. Thus, it is interesting to investigate how the local environments of dispersed active site environment can be precisely tuned to control catalytic reactivity. In this work, we demonstrate control over the local coordination environment of atomically dispersed Rh on Al2O3 through a systematic engineering of interactions between Rh and ReOx or WOx species, which in turn influences catalytic reactivity in ethylene hydroformylation. Whereas ReOx were atomically dispersed on Al2O3 regardless of Re loading, the structure of WOx on Al2O3 varied (atomically dispersed WOx, polystungstate monolayer, to monoclinic WO3 crystallites) by changing W loading, which changes the intrinsic reaction kinetics and mechanism. |
