摘要
采用ＦＴＩＲ技术研究了ＲｂＮＯ３／ＬｉＸ催化剂上的乙醇缩合反应的活性中心．当反应温度≥６３３Ｋ时，乙醇发生热解反应，导致表面负载ＲｂＮＯ３分解，并检测到表面存在ＮＯ－２、ＣＯ２－３、桥联结构的硝基配合物和酰基物种等．结果表明：亚硝酸盐不是硝酸盐分解的终产物，也不是催化反应的活性中心．反应活性物种可能主要是碱金属氧化物或直接形成的ＯＨ－即Ｂ碱．
The nature of the active sited on RbNO 3/LiX catalyst used in ethanol condensation reaction was studied by means of FTIR technique.when the reaction temperature is above 360℃,the thermal decomposition of ethanol occurs,resulting in the decomposition of RbNO 3 impregnated on the surface and the appearance of such surface species as NO - 2,CO 2- 3,bridging nirto complex compound and acetyl group.It is shown by IR and other experiments that nitrite is neither the last product of the decomposition of nitrate nor the active species catalysing the reaction.The basic active sites for the reaction should be alkali metal oxide or hydroxide.
出处
《南京师大学报（自然科学版）》
CAS
CSCD
1997年第4期46-51,共6页
Journal of Nanjing Normal University(Natural Science Edition)
