Probing Single Pt Atoms in Complex Intermetallic Al13Fe4

被引：37

作者：

Yamada, Tsunetomo ^{[1
]}

Kojima, Takayuki ^{[1
,2
]}

Abe, Eiji ^{[3
]}

Kameoka, Satoshi ^{[1
]}

Murakami, Yumi ^{[1
]}

Gille, Peter ^{[4
]}

Tsai, An Pang ^{[1
]}

机构：

[1] Tohoku Univ, IMRAM, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan

[2] Tohoku Univ, Frontier Res Inst Interdisciplinary Sci, Aoba Ku, Aramaki Aza Aoba 6-3, Sendai, Miyagi 9808578, Japan

[3] Univ Tokyo, Dept Mat Sci & Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan

[4] Ludwig Maximilians Univ Munchen, Dept Earth & Environm Sci, Theresienstr 41, D-80333 Munich, Germany

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2018年 / 140卷 / 11期

关键词：

INITIO STRUCTURE SOLUTION; CATALYSIS;

D O I：

10.1021/jacs.7b13658

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：3838 / 3841

页数：4

共 20 条

[11] Ab initio structure solution by charge flipping [J].