表面结构与催化性能关系的模型催化实验——以CuO/Cu_(2)O纳米晶催化乙烯实验与量化计算为例

Surface Structure Dependence of CuO/Cu_(2)O Nanocrystal on Catalytic Oxidation of Ethylene

表面催化是物理化学学科方向的重要分支内容,其中的一个研究重点是催化剂表面结构与催化性能之间的关系。在理论教学中,物质结构决定性质这一理念是教师教学与学生学习的重点,而在实验教学中却鲜有将催化剂微观结构与宏观性能联系起来的探究内容。我们着重参考了使用纳米晶作为模型催化剂进行表面结构与性能关系探究的一系列科研前沿文章,结合教学条件选取了暴露(100)晶面和(111)晶面的立方体和八面体CuO/Cu_(2)O纳米晶作为模型催化剂体系,设计了结合催化剂活性测试和量化计算的创新综合实验。实验和量化计算的结果相互验证,互为补充,有利于学生掌握研究催化剂宏观催化性能与微观表面结构关系的方式方法。

Surface catalysis is an important branch of physical chemistry.The relationship between the surface structure of the catalyst and its catalytic performance is one of the most challenging issues in the fundamental studies of surface catalysis.However,the research contents are rarely involved in the teaching content of chemistry laboratory.In this experiment,we studied the structure-catalytic performance relation of CuO/Cu_(2)O core-shell nanocrystals with different surface structures by combining reaction kinetics analysis and DFT calculations on their catalytic performance in ethylene oxidation.Through this experiment,students will get a profound insight into the relationship between structures and properties of catalysts in surface catalysis.