Reactivity and Morphology of Oxygen-Modified Au Surfaces

被引：13

作者：

Baber, Ashleigh E. ^{[1
]}

Torres, Daniel ^{[2
]}

Muller, Kathrin ^{[2
,5
]}

Nazzarro, Marcelo ^{[3
,4
]}

Liu, Ping ^{[2
]}

Starr, David E. ^{[2
]}

Stacchiola, Dario J. ^{[1
]}

机构：

[1] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA

[2] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

[3] UNSL, Dpto Fis, Lab Ciencias Superficies, RA-5700 San Luis, Argentina

[4] Consejo Nacl Invest Cient & Tecn, INFAP, RA-5700 San Luis, Argentina

[5] Univ Groningen, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 34期

关键词：

SCANNING-TUNNELING-MICROSCOPY; LOW-TEMPERATURE; ATOMIC OXYGEN; CO OXIDATION; ADSORPTION; GOLD; AU(111); RECONSTRUCTION; CHEMISTRY; CHEMISORPTION;

D O I：

10.1021/jp3056653

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：

Inducing the adsorption of oxygen on gold surfaces transforms the inert metal into a surprisingly reactive material, which acts as a highly selective, low-temperature catalyst. The strong interaction of atomic oxygen with Au greatly affects the surface morphology by increasing the number of undercoordinated Au atoms and lifting the surface reconstruction. Through the combination of experimental and theoretical techniques, we have fully characterized an oxygen, modified Au(100) surface and determined the structure-reactivity relationship of O-Au species. Bulk-implanted oxygen does not affect the reactivity of Au surfaces and subsurface oxygen is found to be unstable. Oxygen stabilizes undercoordinated Au atoms on the surface and becomes highly active for oxidation reactions when adsorbed on unreconstructed Au(100) sites.

引用

页码：18292 / 18299

页数：8

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