报告题目：Designing catalysts in terms of electronic structure and metallurgical microstructure
报告人： A.P. Tsai 教授
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
时间： 2016年11月3日（星期四）上午10:00-11:00
地点： 玉泉校区曹光彪大楼326会议室
邀请人： 张泽 院士
Designing catalysts in terms of electronic structure
and metallurgical microstructure
A.P. Tsai
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577
In terms of phase diagrams, there are three possible interactions between any two metallic elements and consequently three states after mixing are expected; intermetallic compound, solid solution and immiscibility. These are indications of bonding nature between metallic elements. On the other hand, the Ellingham diagram is a diagram determining the relative ease of reducing a given metallic oxides to metals. By combining these two metallurgical knowledge and technologies such as leaching, oxidation and reduction, one may design intentionally materials with microstructures favorable for catalysts. One important condition is that the precursor should be a solid solution or an intermetallic compound, which ensures the homogeneity at atomic scale [1-2].
On the other hand, in terms of electronic structure an alloy could be regarded as a new element. Hence, one may expect an alloy exhibiting similar catalytic function to a definite metal [3-6]. The idea is using an alloy to replace Pd, Pt or Rh for catalysis. In the presentation, I will give some case studies to show how metallurgical knowledge can be used to get insights of origin of catalysis and to design catalysts.
[1] S. Kameoka and A.P. Tsai, Catal. Lett., 121(2008) 337
[2] S. Kameoka, T. Tanabe, A.P. Tsai, Appl. Catal. A 375(2010)163
[3] A.P. Tsai, S. Satoshi, Y. Ishii, J. Phys. Soc. Jpn 73(2004) 3270
[4] K. Nozawa, N. Endo, S. Kameoka, A.P. Tsai, Y. Ishii, J. Phys. Soc. Jpn.80(2011)064801
[5] A.P. Tsai et., J. Chem. Phys., 138(2013)144701.
[6] M. Krajci, S. Kameoka, A.P. Tsai, J. Chem. Phys., 145(2016)084703
