1-辛烯在Co/CNTs催化剂上的氢甲酰化研究： 钌的促进作用

采用等体积浸渍法制备了碳纳米管负载的钴及钴-钌双金属催化剂，并以1-辛烯的氢甲酰化反应为探针，研究了所制催化剂的催化性能；用TEM、XRD、TPR、TG技术对催化剂的形貌、物相结构、还原行为和热稳定性进行了研究。结果表明，金属钌能够促进金属钴在碳纳米管上的均匀担载，并有助于金属钴的还原，降低了催化剂的还原温度。1-辛烯的氢甲酰化反应结果表明，少量钌的加入，可明显提高反应的转化率和C9-醛的选择性；在双金属催化剂中，金属催化剂的粒径更小，分布更均匀，钌的加入对钴金属催化剂有促进作用。

Study of 1-octene hydroformylation over Co-/CNTs catalysts: Promotion effect of ruthenium

Carbon nanotubes(CNTs) supported Co and Co-Ru bimetallic catalysts were prepared by an impregnation method.The obtained catalysts were characterized by TEM,XRD,TPR and TG techniques in order to elucidate the dispersion of metal particles,the interaction between cobalt and ruthenium,and the reducibility of catalysts.It has been found that Ru is a promoter to enhance the reducibility of cobalt,and results in cobalt reduction at lower temperatures.The catalytic activities of the as-prepared catalysts were tested with the probe reaction of hydroformylation of 1-octene.The results show that in comparison with Co/CNTs catalysts,Co-Ru/CNTs catalysts exhibit better performance in terms of higher conversion of 1-octene and higher selectivity to C_9-aldehyde.This may be due to the homogenous dispersion of small metal particles and synergic effect of Co and Ru metals in bimetallic catalysts,which can be further attributed to the promoting effect of Ru metal in the catalysts.