Steps, ledges and kinks on the surfaces of platinum nanoparticles of different shapes |
| |
Authors: | Z. L. Wang T. S. Ahmad M. A. El-Sayed |
| |
Affiliation: | a School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA b School of Chemistry, Georgia Institute of Technology, Atlanta, GA 30332-0400, USA |
| |
Abstract: | Platinum nanoparticles with a high percentage of cubic-, tetrahedral- and octahedral-like shapes, respectively, have been synthesized by a shape-controlling technique that we developed recently [Ahmadi et al., Science 272 (June 1996) 1924]. High resolution transmission electron microscopy (HRTEM) is used here to directly image the atomic scale structures of the surfaces of these particles with different shapes. The truncated shapes of these particles are mainly defined by the {100}, {111}, and {110} facets, on which numerous atom-high surface steps, ledges and kinds have been observed. This atomic-scale fine structure of the surfaces of these particles is expected to play a critical role in their catalytic activity and selectivity. |
| |
Keywords: | Catalysis Electron microscopy Platinum Stepped single crystal surfaces Surface defects Surface structure, morphology, roughness, and topography |
本文献已被 ScienceDirect 等数据库收录! |
|