Imaging Gold Atoms in Site-Isolated MgO-Supported Mononuclear Gold Complexes

被引：23
|
作者：
Uzun, Alper [1 ]
Ortalan, Volkan [1 ]
Hao, Yalin [1 ]
Browning, Nigel D. [1 ,2 ]
Gates, Bruce C. [1 ]
机构：
[1] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA
[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 39期
基金：
美国国家科学基金会;
关键词：
CO OXIDATION; ELECTRON-MICROSCOPY; AU-III; 298; K; CATALYSTS; NANOPARTICLES; REACTIVITY; GOLD(III); OXIDE;
D O I：
10.1021/jp906754j
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Metal oxide- and zeolite-supported mononuclear gold complexes have been inferred, on the basis of spectroscopic data, to be catalytically active for alkene hydrogenation and CO oxidation. However, direct evidence that the catalysts are isolated, individual gold complexes in the absence of gold clusters or particles has been missing. Now we report the first evidence of uniquely site-isolated gold complexes on high-area MgO-in the absence of gold clusters or particles; the images were obtained with aberration-corrected scanning transmission electron microscopy.
引用
收藏
页码：16847 / 16849
页数：3
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