摘要
用 TPSR法对丙烯在硫酸镍高分散型催化剂上反应过程进行考察 ;用 NH3 - TPD法对 NH3吸附中心进行跟踪 ,发现除强弱两类酸中心外 ,确有第三类活性中心 ,此第三类活性中心可能就是配位催化活性中心 .用准原位 EPR,XPS方法观察到活性中间态 Ni+的存在 .UV- DRS谱图发现 :不同温度吸附丙烯后 ,出现不断变化的新的吸收信息 .
The process of reaction of propylene in the presence of highly dispersed Ni 2+ catalysts was observed. The adsorption sites of NH 3 were traced by the NH - 3 TPD technique. Along with the centers of strong and weak acids, a third active center was discovered that was possibly the center of coordination catalysis. The presence of active intermediate state of Ni + was assured by EPR and XPS methods. It was found in the UV DRS spectra that new and ever changing peaks of adsorption emerged after the adsorption of propylene at various temperatures. Hence, the process of coordination catalysis was proved at least in part.
出处
《兰州大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2000年第2期59-66,共8页
Journal of Lanzhou University(Natural Sciences)
基金
厦门大学固体表面物理化学国家重点实验室!(9507)资助项目
