多相催化与材料表征技术应用于物理化学实验:Ag/SiO_2催化剂的制备及其催化氧化CO实验

Application of Heterogeneous Catalysis and Material Characterization Techniques in Physical Chemistry Experiment:Preparation of Ag/SiO_2 Catalyst and Its Performance of Catalytic Oxidation of CO

制备了一个贵金属负载型催化剂并对其催化氧化CO性能进行了测试。采用等体积浸渍法制备了Ag/SiO2催化剂,并通过X射线粉末衍射(XRD)、透射电子显微镜(TEM)、N2-吸脱附曲线及程序升温还原(H2-TPR)表征了催化剂的结构和形态。结合材料的表征数据及性能测试结果分析探讨银的负载量对催化氧化CO活性的影响,进一步探究该催化反应的进行机制。该实验将多相催化和现代测试技术与物理化学实验教学相结合,可以让学生获取催化学科的前沿知识,了解催化反应以及各种现代测试技术的基本原理,从而提高学生的综合实验能力,激发独立思考和创新的意识,有利于创新性人才的培养。

A supported nobie metal catalyst was prepared and its performance of catalytic oxidation of CO was tested,the multi-phase catalysis and modern test technology are combined with physical chemistry experiment teaching.The Ag/SiO2 catalyst was prepared by incipient-wetness impregnation method.The structure and morphology of the catalysts were characterized by X-ray powder diffraction (XRD),transmission electron microscope (TEM),N2 adsorption-desorption curve and temperature programmed reduction (H2-TPR).The influence of the silver loading on the catalytic oxidation activity of CO was discussed based on the analysis of the data of the material and the results of the performance test,and the mechanism of the catalytic reaction was further explored.This experiment will enable students to acquire the frontiers-of the catalytic discipline, understand the catalytic reaction and the basic principles of various modern test techniques.It can also improve students’comprehensive experimental ability,stimulate independent thinking and innovative consciousness,which is beneficial to the cultivation of innovative talents.