Catalysis by isolated single atom
소속 :
연사 : Dr. Ja Hun Kwak(Pacific Northwest National Laboratory, USA)
일시 : 2012-07-17 11:00 ~
장소 : 302동 809호
일 시 : 2012년 7월 17일, 11:00 AM
장 소 : 302동 809호
-Abstract-
Catalysis has long been and continues to be a nano science and technology. What has changed in recent years is the availability of methods that dramatically improve our ability to synthesize, characterize and manipulate material structures at the nano scale. Of special interest is the controlled preparation of atomic and nano-sized clusters on oxide support materials. Similarly, the introduction of metal ions and nanoclusters into zeolite structured oxides provides unique chemical environments both in terms of the nuclearity of the metal or metal oxide catalyst and the three-dimensional environment surrounding the catalytic phase. In this presentation, I will present results of recent studies in our labs that demonstrates unique activity for nano-sized, even atomically dispersed catalytic metals and oxides on γ alumina supports. For this work, I also make use of a combination of high-angle annular dark-field scanning transmission electron microscopy, and ultrahigh magnetic field solid state magic angle spinning NMR, coupled with density functional theory calculations, to reveal the nature of anchoring sites of catalytically active phases.
장 소 : 302동 809호
-Abstract-
Catalysis has long been and continues to be a nano science and technology. What has changed in recent years is the availability of methods that dramatically improve our ability to synthesize, characterize and manipulate material structures at the nano scale. Of special interest is the controlled preparation of atomic and nano-sized clusters on oxide support materials. Similarly, the introduction of metal ions and nanoclusters into zeolite structured oxides provides unique chemical environments both in terms of the nuclearity of the metal or metal oxide catalyst and the three-dimensional environment surrounding the catalytic phase. In this presentation, I will present results of recent studies in our labs that demonstrates unique activity for nano-sized, even atomically dispersed catalytic metals and oxides on γ alumina supports. For this work, I also make use of a combination of high-angle annular dark-field scanning transmission electron microscopy, and ultrahigh magnetic field solid state magic angle spinning NMR, coupled with density functional theory calculations, to reveal the nature of anchoring sites of catalytically active phases.
