| Literature DB >> 29510035 |
Tsunetomo Yamada1, Takayuki Kojima1,2, Eiji Abe3, Satoshi Kameoka1, Yumi Murakami1, Peter Gille4, An Pang Tsai1.
Abstract
The atomic structure of a 0.2 atom % Pt-doped complex metallic alloy, monoclinic Al13Fe4, was investigated using a single crystal prepared by the Czochralski method. High-angle annular dark-field scanning transmission electron microscopy showed that the Pt atoms were dispersed as single atoms and substituted at Fe sites in Al13Fe4. Single-crystal X-ray structural analysis revealed that the Pt atoms preferentially substitute at Fe(1). Unlike those that have been reported, Pt single atoms in the surface layers showed lower activity and selectivity than those of Al2Pt and bulk Pt for propyne hydrogenation, indicating that the active state of a given single-atom Pt site is strongly dominated by the bonding to surrounding Al atoms.Entities:
Year: 2018 PMID： 29510035 DOI： 10.1021/jacs.7b13658
Source DB: PubMed Journal: J Am Chem Soc ISSN： 0002-7863 Impact factor: 15.419