多元非晶态合金纳米管的可控制备及催化性能研究

项目名称： 多元非晶态合金纳米管的可控制备及催化性能研究

项目编号： No.21273109

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： 郭学锋

作者单位： 南京大学

项目金额： 82万元

中文摘要： 非晶态合金具有独特的结构，在催化加氢、脱氢等反应中具有重要应用。其组成、结构和形貌对催化性能具有重要影响。将非晶态合金做成纳米管，系统调控其组成、结构和尺寸，并考察相应的催化性能是非常有意义的课题。如其纳米管内表面可能的多位点协同作用及限域环境，会对管内催化反应产生特殊的效应，可望获得高性能催化材料。本组前期工作已初步揭示了这一点，发现小管径的纳米管催化性能更优越，还发现三元NiPB纳米管比二元NiB纳米管更稳定，这些揭示了探讨液相反应中非晶态纳米管内限域效应这一科学问题的重要性。因此，本课题拟进一步研究合成机理，获得一系列管径与组成可调的多元非晶态合金纳米管，深入研究管径与限域效应，多元组成与纳米管稳定性、催化活性及选择性之间的关系，并针对应用目标调变管径尺寸、组成种类及比例，着力开发具有工业应用价值的选择性加氢催化剂。

中文关键词： 非晶合金；纳米管；合成；机理；催化

英文摘要： Noncrystalline alloys have been found important applications in catalytic hydrogenation、dehydrogenation reactions and etc. due to their unique structures. Plenty of research reports have shown that the composition、structure and morphology of noncrystalline alloy have great influence on their catalytic performance. As indicated by our previous results, compared with common catalysts,nanotubular structured catalysts may show cooperativity between multiple binding sites and confinement effect, due to the distinctive nanosized bended structure and the nanosized confined space, respectively, which contribute to their high catalytic activity and special selectivity. So it will be very interesting explorative project to fabricate the noncrystalline alloys as nanotubes and further investigate their catalytic performance. In our previous studies, it had been found that the small-diameter nanotubes show better catalytic performance than big ones and the ternary NiPB noncrystalline alloy nanotubes was more stable than the binary NiB nanotubes, which indicated the importance of exploring the scientific problem about the confinement effect within nanotubes in the liquid reaction. In this project we will further investigate the formation mechanism of these novel noncrystaline alloy nanotubes, to obtain a set of polynary nonc

英文关键词： noncrystalline alloy；nanotubes；synthesis；mechanism；catalysis