【摘要】 用溶胶凝胶法制备了尖晶石型Ｃｏ２ＭｎＯ４超细粒子，用ＤＴＡＴＧ，ＸＲＤ，ＴＥＭ，ＦＴＩＲ等手段研究了Ｃｏ２ＭｎＯ４超细粒子的形成过程，进而用反应评价结合ＸＲＤ，ＸＰＳ，ＢＥＴ比表面积测试研究了Ｃｏ２ＭｎＯ４催化剂的比表面积和表面结构与其ＦＴ反应性能间的关系．结果表明，Ｃｏ２ＭｎＯ４超细粒子可以在较低温度（２５０～３５０℃）下形成，并具有粒度小，分布均匀等特点．用该法制备的超细粒子Ｃｏ２ＭｎＯ４，其催化活性明显优于相同组成的大颗粒催化剂．更多还原

【Abstract】 Spinel type Co 2MnO 4 ultrafine particles were prepared by sol gel method, the formation process was studied by DTA TG, XRD, TEM and FT IR. The structure and catalytic properties of the Co 2MnO 4 catalysts were also studied by BET surface area measurement, XPS and CO hydrogenation reaction tests. It is shown that the well distributed Co 2MnO 4 ultrafine particles with average diameter ca. 10 nm can be formed at low temperatures (250～350℃), and its catalytic activity for CO hydrogenation is much higher than that of the large particle sample.更多还原