双稀土氟氧化物SMlAOf具有良好的乙烷氧化脱氢（OdE）催化性能，特别是对于SM2O3lAf3（1∶1摩尔比），在973k，乙烯选择性为897%，乙烷转化率为221%，是目前报道的具有高乙烯选择性的OdE反应催化剂.比表面积和Xrd测试表明，SM2O3lAf3催化剂体相是由单一相结构的双稀土氟氧化物SM2/3lA1/3Of组成，比表面积较小.原子力显微镜（AfM）研究表明，该催化剂的表面颗粒排布规整致密，粒径均匀；而其它乙烯选择性较低的催化剂颗粒排布较为松散，颗粒大小不一.Sm La O F series catalysts show good performance for oxidative dehydrogenation of ethane (ODE) reaction.89 7% of ethene selectivity and 22 1% of ethane conversion were achieved on Sm 2O 3 LaF 3 (1∶1 in mole) at 973 K.Atom force microscope (AFM) images clearly show that for the Sm 2O 3 LaF 3 (1∶1), its particles locate compelled, and their radii are uniform, while for the Sm 2O 3 LaF 3 (1∶3) and Sm 2O 3 LaF 3(3∶1) the particles locate loose and their radii vary greatly.国家自然科学基
