银基核壳结构催化剂上甲醛催化氧化性能研究

项目名称： 银基核壳结构催化剂上甲醛催化氧化性能研究

项目编号： No.21507109

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 化学工业

项目作者： 陈丹

作者单位： 扬州大学

项目金额： 21万元

中文摘要： 甲醛是室内环境中最严重的空气污染物，几乎所有新装修房间都存在甲醛污染，因此研究新型甲醛净化技术和净化材料、有效消除室内甲醛污染成为改善人们生活环境的重要任务。前期研究工作已经表明，银基催化剂在甲醛催化氧化反应中能够表现出独特的银氧相互作用，对甲醛能够有效的吸附活化解离，但是目前银基催化剂上甲醛常温催化氧化反应活性仍然有待提高。本项目旨在前期工作的基础上，针对银催化剂上独特银氧特性与贵金属铂、金等上高效催化反应活性，重点研究贵金属掺杂的银基核壳结构新型催化剂材料上甲醛低温催化氧化反应性能。项目设计制备调控活性银基核壳结构催化剂材料，通过研究催化剂结构与催化活性之间的构效关系以及甲醛在具有不同核壳结构的催化剂上吸附-脱附性能的研究，认识贵金属铂、金和银分别在甲醛氧化反应中的作用机制，阐明催化反应机理，为构筑具有实用价值的纳米银基催化剂奠定基础。

中文关键词： 银催化剂；贵金属；核壳结构；催化活性；反应机制

英文摘要： Formaldehyde (HCHO) is one of the most serious pollutant in indoor air. Therefore, the studies on new HCHO elimination technology and material become the hot issue for improving the living environment. The previous studies suggested that Ag based catalyst is identified as a potential catalyst due to its particular interaction between Ag and O and the ability about adsorption and dissociation. However, the complete HCHO catalytic oxidation reaction temperature is still high and the research about the room temperature catalytic oxidation performance over Ag based catalysts is still challenging. In order to solve this problem, HCHO low temperature catalytic oxidation performance over Ag based core-shell catalysts is investigated due to the particular interaction between Ag and O and the effective catalytic oxidation activity over noble metal catalysts such as Pt and Au. The preparation, design and regulation of Ag based core-shell catalysts would be studied in this project firstly. Then the structure-activity relationship and the adsorption-desorption behavior over Ag based core-shell catalysts are studied in order to illustrate the role about Pt, Au, and Ag in HCHO catalytic oxidation reaction. Lastly, the catalytic oxidation reaction mechanism is illuminated in this project over Ag based core-shell catalysts, which would lay the foundation of the construct Ag catalysts with practical value.

英文关键词： Ag catalysts;noble metal;core-shell structure;catalytic activity;reaction mechanism