| 摘 要： | The catalytic performance of bimetallic Ru-M(M=Co,Fe,Ni,Mo,Rh,Cr,Mn)catalystS prepared from a series of Ru-M carbonyl clustersin CO hydrogenation has been investigated.The catalysts derived from Ru-Co,Ru-M and Ru-Mo bimetallic carbonyl clusters showed high activity and selec-tivity for higher oxygenates,compared with the Ru_6/SiO_2,catalyst Preparedfrom impregnation of monometallic cluster Ru_6C(CO)_(17).For Ru-Ni and Ru-Rh catalysts,they did not show high promotion for the formation of oxygenatesalthough the selectivity was over 10% at 519K.The promoters such as Mnand Cr in Ru-Mn and Ru-Cr catalysts intensively led to a decrease of oxygenateamount,in comparison with to Ru_6/SiO_2 catalyst.In silu FT-IR studies re-vealed that the intensity of band at 1584 cm~(-1) for Ru-M(M=Co,Fe and Mo)bimetallic cluster-derived catalysts at 453 K under syngas(CO/H_2=0.5) has agood linear relationship to rates of oxygenate formation,whereas the band at1584 cm~(-1)was not observed for Ru-Mu,Ru-Cr,Ru-Rh and Ru-Ni bimetall
|
