Pt/Ce-Ni-SBA-15介孔分子筛的合成及性能研究

The synthesis and properties of Ce-Ni-SBA-15 mesoporous molecular sieves

利用微波合成法将Ce和Ni引入到SBA-15分子筛骨架中。通过X射线粉末衍射(XRD)、傅立叶变换红外(FT-IR)、紫外可见漫反射(DRS)、透射电镜(TEM)和N2的等温吸附-脱附法等手段进行表征。结果表明,Ce和Ni物种进入SBA-15分子筛的骨架。将它作为催化剂载体,负载上Pt,以CO氧化为模型反应,考查催化剂的活性。结果表明,Pt/Ce-Ni-SBA-15催化剂的最低完全转化温度为227℃,与Pt/SBA-15相比,最低完全转化温度降低了39℃。说明了骨架掺杂后的Ce-Ni-SBA-15与SBA-15相比更有望成为更优良的催化剂载体。

.Ce-Ni-SBA-15 mesoporous molecular sieves was successfully synthesized by a microwave method, and characterized by X-ray diffractometer （XRD） , Infrared spectroscopy （FT-IR）, DR ultraviolet and visible spectrophotometry （DRS）, transmission electron microscope and low temperature N2 adsorption-desorption method. The result showed that the Ce and Ni were successfully incorporated into the framework of SBA-15 molecular sieves. Then the Ce-Ni-SBA-15 was loaded with Pt and applied in the CO oxidation reaction, and presences high catalytic activity. The result shows that the lowest complete conversion temperature of the CO on Pt/Ce-Ni- SBA-15 catalyst is 227℃, which is 39℃ lower than that of the Pt/SBA-15. Hence one can conclude that Ce-Ni- SBA-15 is a superior support for catalyst.