超微粒子催化剂以其表面积大、反应活性高、选择性好、使用寿命长等优点而引起人们的重视.本文以F-T合成催化活性物种为a-Fe、Fe_xC_y等催化剂的机理为依据,用激光热解法制备了非晶态Fe/C超微粉,经有机溶剂洗涤及高温处理获得碳化铁催化剂.XRD、TEM及电子衍射测试结果表明,其粒度大都在1～4nm之间,为多晶态的a-Fe、Fe_3C及Fe_2C.初步探索了利用激光选择热解法制备超微粒子催化剂的方法和规律. Ultrafine particle catalysts attract people’s attention because of their large surface area, high reactivity, good selectivity and long service life.In this paper, based on the mechanism of catalyst such as a-Fe and Fe_xC_y, The amorphous Fe / C superfine powder was prepared by the solution method, and the iron carbide catalyst was obtained by organic solvent washing and high temperature treatment.The results of XRD, TEM and electron diffraction showed that the particle size was mostly in the range of 1 ~ 4nm and was polycrystalline a-Fe, Fe 3 C and Fe 2 C. The methods and rules for the preparation of ultrafine particle catalysts by laser-selective pyrolysis were explored.