摘要
用溶胶 凝胶法制备了超细Fe Al P O催化剂 ,并用DTA TG ,BET ,TEM ,XRD ,TPR和IR等技术研究了催化剂的微观组成和结构及其晶格氧活性 ,探讨了催化剂的制备工艺 ,考察了溶胶 凝胶的形成机理、凝胶干燥及焙烧条件对催化剂微观组成和结构的影响规律 .结果表明 ,Fe Al P O催化剂呈非晶态 ,是具有均匀分布的超细粒子 (10nm ) ,其比表面积大 (2 38m2 / g) ,晶格氧活性高 .FePO4 和AlPO4 间隔分布在催化剂表面 ,形成Lewis碱位 (P =O ,P O Fe)和Lewis酸位 (Fe3 + ,Al3 + ) .
Ultrafine Fe-Al-P-O catalyst was prepared by sol-gel method. The composition and structure of the catalyst were systematically characterized by DTA-TG, BET, TEM, XRD, TPR and IR techniques. The preparation process, the formation mechanism of sol-gel and the effects of gel drying and calcination conditions on the catalyst were discussed. The results showed that the Fe-Al-P-O catalyst is non-crystal phase and well-distributed ultrafine particles (10 nm), having a high specific surface area (238 m 2/g) and high lattice oxygen activity. FePO 4 and AlPO 4 distribute at intervals, and there exist Lewis base sites (P=O and P-O-Fe) and Lewis acid sites (Fe 3+ and Al 3+) on the catalyst surface.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2003年第8期605-608,共4页
基金
国家自然科学基金资助项目 (2 97730 31)
国家重大基础研究前期专项基金资助项目 (2 0 0 1CCA0 36 0 0 )
关键词
溶胶-凝胶法
超细粒子
非晶态
铁
铝
磷
复合氧化物
乙烷
部分氧化
sol-gel method, ultrafine particle, non-crystal phase, iron, aluminum, phosphorus, composite oxide, ethane, partial oxidation
