TY - JOUR
T1 - Probing Single Pt Atoms in Complex Intermetallic Al13Fe4
AU - Yamada, Tsunetomo
AU - Kojima, Takayuki
AU - Abe, Eiji
AU - Kameoka, Satoshi
AU - Murakami, Yumi
AU - Gille, Peter
AU - Tsai, An Pang
N1 - Funding Information:
The authors thank Dr. Y. Matsushita and Mr. A. Sato for assistance during single-crystal XRD experiments at the National Institute for Materials Science (NIMS). The XPS experiments were performed at the SPring-8 facility (Project 2016B4907). A.P.T. acknowledges support from the Dynamic Alliance for Open Innovation Bridging Human Environment and Materials.
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/3/21
Y1 - 2018/3/21
N2 - 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.
AB - 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.
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U2 - 10.1021/jacs.7b13658
DO - 10.1021/jacs.7b13658
M3 - Article
C2 - 29510035
AN - SCOPUS:85044210275
SN - 0002-7863
VL - 140
SP - 3838
EP - 3841
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 11
ER -