Novel catalytic functions induced by charge accumulation at subnano interface between unisize metal cluster disk and semiconductor surface

作者：Yasumatsu Hisato^*; Fukui Nobuyuki

来源：Surface and Interface Analysis, 2014, 46(12-13): 1204-1207.

DOI：10.1002/sia.5646

• platinum clusters
• silicon surface
• cluster deposition
• CO oxidation
• catalysis

We have successfully accumulated electrons in a subnano-space according to the Schottky barrier junction between a subnano metal cluster and a semiconductor surface. The scanning-tunneling microscopy/spectroscopy measurements depicted spatial distributions of the accumulated charges. Taking advantages of their large charge-transfer efficiency to molecules, novel catalytic functions driven by the subnano-space charges were studied by means of ultrahigh-sensitive temperature-programmed desorption mass spectroscopy. As a representative function, we have found high-performance catalytic activity of Pt-30 monatomic-layered disks constructed on the Si(111) surface in CO oxidation.

• 出版日期2014-12