摘要
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<sub>x</sub>C<sub>y</sub>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<sub>3</sub>C及Fe<sub>2</sub>C.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.
A preparation method of Fe3C ultrafine particle catalyst,from highly dispersed amorphous Fe powder and free carbon by laser pyrolysis technique,was investigated.The catalytical reactive species,α-Fe,and iron carbonide catalyst for F-T synthesis were obtained directly.The catalyst obtained under different experimental conditions was characterized by XRD,electronic diffraction and TEM techniques.The influences of preparation condition on the crystalline grain size,crystal shape of the catalyst obtained and the component of iron carbonide in the catalyst,are also disscused.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第9期1265-1267,共3页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
F-T合成
超微粒子
催化剂
碳化铁
F-T synthesis,Ultrafine particle catalyst,Iron carbonide
