Probing Single Pt Atoms in Complex Intermetallic Al13Fe4

Tsunetomo Yamada, Takayuki Kojima, Eiji Abe, Satoshi Kameoka, Yumi Murakami, Peter Gille, An Pang Tsai

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)3838-3841
Number of pages4
JournalJournal of the American Chemical Society
Volume140
Issue number11
DOIs
Publication statusPublished - 2018 Mar 21

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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