电正性金属对Pt/TiO_2-ZrO_2催化剂上糠醛选择性加氢的影响  

Effects of Electropositive Metals on Selective Hydrogenation of Furfural over Pt /TiO_2-ZrO_2 Catalysts

作　　者：许宝华[1] 陈兵峰[2] 黄志军[2] 芦涛[2] 王语婧 余露佳 

机构地区：[1]江苏索普(集团)有限公司,镇江212006 [2]中国科学院化学研究所,北京100190 [3]吉林大学生命科学学院 [4]天津大学化工学院

出　　处：《化学通报》2013年第11期1029-1033,共5页Chemistry

摘　　要：采用溶胶-凝胶法制备了TiO2-ZrO2复合氧化物载体,采用浸渍法负载铂和电正性金属(M=Re、Sn或In)制备了Pt/TiO2-ZrO2和Pt-M/TiO2-ZrO2催化剂,用于糠醛液相选择性催化氢化制糠醇。利用X射线衍射、X射线光电子能谱等技术对催化剂进行了表征。结果表明,与单金属铂催化剂相比,加入电正性金属(M=Re、Sn或In)后,催化剂的电子结构发生了改变,从而使双金属催化剂具有更高的催化性能,催化活性增加的顺序与电正性金属的电负性大小次序一致,均为Re>Sn>In。其中,加入铼的催化剂效果最佳,糠醛转化率100%,糠醇的选择性达到95.7%。TiO2-ZrO2 composite oxide support was prepared by Sol-gel method. Pt/TiO2-ZrO2 and Pt-M/TiO2- ZrO2（ M = Re, Sn or In）catalysts were prepared by the impregnation method and characterized by X-ray powder diffraction and X-ray photoelectron spectroscopy. Their catalytic performance in the liquid phase hydrogenation of furfural was investigated. The results showed that the electronic structure of the catalysts have been changed after introducing electropositive metal compared with single metal catalyst. These effects enhanced the catalytic performance of bimetal catalysts in this reaction. The order of increase in catalytic activity is consistent with the order of electonegativity of electropositive metal, which both are Re 〉 Sn 〉 In. Among them, the best catalyst was obtained by additing Re, the conversion of furfural is 100% and the selectivity of furfuryl alcohol is 95.7%.

关 键 词：二氧化钛 氧化锆 糠醛 选择性加氢 糠醇 铂 铼 

分 类 号：O643.32[理学—物理化学]