【作者】 王定胜； 李亚栋；

【Author】 Dingsheng Wang;Yadong Li;Department of Chemistry,Tsinghua University;

【机构】 清华大学化学系；

【摘要】 合金和金属间化合物作为一类特殊的金属材料,其组成金属间的电子和轨道的互相影响使得此类材料具有一些特殊而优异的物理和化学性能,从而使其成为一类具有特殊用途的金属材料。另外,贵金属和非贵金属元素组成的合金及金属间化合物是理想的低成本工业催化剂候选材料,合成具有大比表面积的此类催化剂单分散纳米晶具有十分重要的理论意义和实际应用价值。近年来,我们在该领域做了系统的研究工作:在深入研究合成条件对产物微结构影响的基础上,探索双金属纳米晶成核与生长的规律,构建相关的形貌控制模型,在分子水平上探察其微观生长机理,寻求对其奇异的催化性能的理解,并总结规律。更多还原

【Abstract】 Bimetallic nanocrystals(NCs) with core-shell,heterostructure,or intermetallic and alloyed structures are emerging as more important materials than monometallic NCs.They are expected to display not only a combination of the properties associated with two distinct metals,but also new properties and capabilities due to a synergy between the two metals.More importantly,bimetallic NCs usually show composition-dependent surface structure and atomic segregation behavior,and therefore more interesting applied potentials in various fields including electronics,engineering,and catalysis.Compared with monometallic NCs,preparation of bimetallic NCs is much more complicated and difficult to be achieved.In recent years,our group has made great efforts in this area.更多还原