多功能蛋黄－蛋壳结构聚苯胺负载型贵金属纳米催化剂的合成及性能研究

项目名称： 多功能蛋黄－蛋壳结构聚苯胺负载型贵金属纳米催化剂的合成及性能研究

项目编号： No.21273004

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 韩杰

作者单位： 扬州大学

项目金额： 78万元

中文摘要： 青年科学基金紧密围绕项目目标，建立了高性能导电高分子负载型贵金属纳米催化剂构筑新方法，阐明导电高分子负载型贵金属纳米催化剂的反应机制及调控规律，揭示了催化剂结构与性能之间的关联。然而，要真正得到长使用寿命高活性多功能聚苯胺负载贵金属纳米催化剂，必须寻求行之有效的贵金属纳米催化剂粒径控制新途径以及解决纳米催化剂重复使用过程中催化剂纳米粒子的团聚及流失问题。在前期研究基础之上，进一步引入蛋黄－蛋壳结构，拟构筑多功能蛋黄－蛋壳结构磁性聚苯胺负载型贵金属纳米催化剂，介孔二氧化硅外壳提供分子通道，纳米空间的存在有利于反应分子与催化剂的充分接触从而增加催化效率。研究蛋黄－蛋壳结构磁性聚苯胺负载贵金属纳米催化剂在醇选择性氧化、Suzuki-Miyaura偶联等重要有机反应中的催化特性，揭示构效关系，为拓展导电高分子在贵金属纳米催化剂领域的应用提供理论基础，并发展新型、高效功能性贵金属纳米催化剂。

中文关键词： 聚苯胺；催化剂；蛋黄-蛋壳结构；贵金属纳米粒子；磁性

英文摘要： The former project has discovered novel strategies for high performance conducting polymer-supported noble metal nanocatalysts, has established redox mechanisms and morphology control rules involved in conducting polymer-supported noble metal nanocatalysts, and has revealed relationships between structure and property of conducting polymer-supported noble metal nanocatalysts. However, in order to realize long life together with high performance conducting polymer-supported noble metal nanocatalysts, strategies must be developed to control over catalyst size and overcome aggregation and leaching of noble metal nanocatalysts. Based on previous observations, yolk/shell structures are further introduced to develop multifunctional yolk/shell nanostructures of magnetic PANI-supported noble metal nanocatalysts. The mesoporous structures of SiO2 shells with nanochannels allow molecules to diffusion inside and outside, whereas the voids between silica shells and noble metal catalysts provide ideal room for inclusion of sufficient molecules with efficient contact with catalysts. Catalytic performances of yolk/shell nanostructures of magnetic PANI-supported noble metal nanocatalysts in selective oxidation of alcohols, Suzuki-Miyaura cross-coupling reactions are then investigated. According to experimental results, relation

英文关键词： polyaniline；catalyst；yolk-shell structure；noble metal nanoparticle；magnetism