首页|Influence of the defects on selective hydrogenation of cinnamaldehyde to cinnamyl alcohol over UiO-66 supported Pt catalysts
Influence of the defects on selective hydrogenation of cinnamaldehyde to cinnamyl alcohol over UiO-66 supported Pt catalysts
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NSTL
UiO-66 supported metal catalysts have shown high catalytic activity and selectivity to cinnamyl alcohol(COL)in the selective hydrogenation(SHYD)of cinnamaldehyde(CAL),but the roles of missing-linker defects(MLDs)in UiO-66 on the catalytic performance of the UiO-66 supported metal catalysts have less been reported.Here,UiO-66 supports with the different amount of MLDs were used as the supports,and three series of UiO-66 supported Pt(Pt/U)catalysts were prepared by sol-impregnation,wet-impregnation as well as in-situ encapsulation methods,respectively.The influences of the MLDs in UiO-66 on the catalytic properties of the prepared Pt/U catalysts in the SHYD of CAL were investigated.The series of Pt/U-720 catalysts with the more MLDs showed higher CAL conversion and selectivity to COL than the corresponding Pt/U-F catalysts with fewer MLDs.The different preparing methods affect the location and dispersion of Pt species on UiO-66 supports and the metal-support interaction,but the location of the supported Pt species on UiO-66 is the critical factor affecting the catalytic properties of Pt/U catalysts.The presence of the MLDs in UiO-66 is the key to preparing UiO-66 supported Pt catalysts with high SHYD performance.
NSTL
