表/界面优化的氧化铈多壳层空心结构的构筑及催化性能研究

项目名称： 表/界面优化的氧化铈多壳层空心结构的构筑及催化性能研究

项目编号： No.51472025

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 于然波

作者单位： 北京科技大学

项目金额： 83万元

中文摘要： 本课题将以新型CeO2基催化材料的设计与合成为切入点展开研究。设计合成具有大比表面积、高活性表面的多壳层空心球微纳结构；此种微纳结构材料具有自支撑结构特点，即不仅有着大比表面积，高物质传输性，同时在应用过程中可保持空心多壳层微纳结构稳定，因而避免了结构基元发生聚集而造成比表面积、表面能损失和性能下降。本研究将通过使用水合碳球模板法及溶液组装过程系统研究获得多壳层空心球结构的关键制备参数和技术路线；研究合成体系中Ce离子与模板剂的相互作用规律，形成普适可靠的制备技术；探索多壳层空心球的有效表面/界面优化手段，以期获得高活性及高选择性的纳米微米CeO2催化材料。并以探针催化反应检测催化剂的催化活性，揭示材料构效关系，进而指导材料的合成与优化，为高性能的催化材料的控制制备奠定基础。

中文关键词： 纳米/微米结构；多壳层；空心球；表面/界面；催化

英文摘要： In this project, the design and synthesis of novel CeO2-based catalytic materials will be the starting point. We planned to design and synthesize micro-nano sized multi-shell hollow spheres with large specific surface area and high active surface. Such micro-nano structured materials with self-supporting structure features that not only have a large surface area but also high mass transfer, while in the application process the hollow multi-shell micro-nano structures can be maintained stably, so as to avoid decreasing of surface area, surface energy and performance caused by structural motifs aggregation. In this study, through a systematic research by using carbonaceous spheres template and assembly process, the multi-shell hollow spheres will be synthesized and the corresponding key synthetic parameters and routes will be obtained. Interaction characteristics of Ce ions and template in the synthetic system will be investigated, so as to build up a reliable universal preparation technique for the multi-shell hollow spheres. The effective activation for the surface/interface optimization of the multi-shell hollow spheres will be explored to achieve high activity and high selectivity of the nano-micro CeO2 catalytic materials. Moreover, by applying the catalysts in the probe catalytic reactions their catalytic activity will be detected, the structure-performance relationship will be revealed, which will help to guide the synthesis and optimization of the materials, and lay the foundation for the control of high-performance catalytic materials preparation.

英文关键词： nano/micro structure;multi shell;hollow sphere;surface/interface;catalytic property