摘要
用XPS、TGDTA、XRD和TPR等表征技术,研究了Fe对Co/γ-Al2O3催化剂的改性作用。XPS研究表明:Fe的引入使Co在载体表面产生富集,Co在催化剂表层含量是未加Fe前的3倍;TGDTA分析表明,Fe对催化剂的热效应影响很小;XRD实验得出,Fe高度分散在钴催化剂之间,阻止Co3O4晶体增长,提高了Co的分散度;TPR结果显示,Fe使催化剂的还原温度向高温方向移动,说明Fe与催化剂Co存在相互作用。
The reason why the catalytic activity of Co/γ-Al_2O_3 is improved by Fe was investigated using XPS,TG-DTA,XRD and TPR techniques.XPS characterization indicated that with the addition of Fe,Co2p content on the surface of catalysts was 3 times as before.TG-DTA result showed that the weight loss temperature and thermostability were little changed.XRD result indicated that the particle size of Co_3O_4 was decreased and the dispersity was improved by Fe.TPR result revealed that the reduction temperature was raised by the interactions of Co and Fe.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2005年第6期447-450,共4页
Fine Chemicals
基金
国家自然科学基金资助项目(20266001)
广西高校百名中青年学科带头人资助项目([2002]467)~~
关键词
铁
钴
肉桂醛
肉桂醇
选择性加氢
iron
cobalt
cinnamaldehyde
cinnamyl alcohol
selective hydrogenation
