硅藻土负载Co-Fe肉桂醛选择加氢催化剂的制备与表征  

Preparation and characterization of Co-Fe/diatomite catalysts for cinnamaldehyde selective hydrogenation

作　　者：李万伟[1] 刘自力[2] 李敏[1] 

机构地区：[1]湖南怀化学院化学与化工系,湖南怀化418008 [2]广州大学化学化工学院,广东广州510630

出　　处：《工业催化》2009年第5期32-36,共5页Industrial Catalysis

基　　金：国家自然科学基金资助项目(20266001)

摘　　要：以肉桂醛选择性加氢制肉桂醇为探针反应,通过制备不同Fe含量的Co-Fe/硅藻土催化剂并进行催化性能评价。结合XRD、SEM和正电子寿命谱等进行表征,结果表明,Fe对Co_3O_4晶体的完整程度产生影响,导致晶体缺陷数增加。Fe引入使活性助分在载体硅藻土表面分散性更好,分散的单层性明显,负载在硅藻土上催化剂的晶粒粒径也有变小趋势。Co-Fe/diatomite catalysts with different Fe content were prepared and tested using cinnamaldehyde selective hydrogenation to cinnamyl alcohol as the probe reaction. The catalysts were characterized by XRD, SEM and positron annihilation. The results indicated that Fe affected the perfectness of Co3O4 crystals and led to increase in crystal defects. Introduction of Fe improved dispersion of active components on the surface of diatomite, increased proportion of single layer dispersion of the crystals and reduced grain size of the active crystals on diatomite.

关 键 词：催化化学 Co—Fe/硅藻土催化剂 肉桂醛 选择加氢 催化剂表征 

分 类 号：O643.36[理学—物理化学] TQ426.82[理学—化学]