Room-Temperature Reaction of Oxygen with Gold: An In situ Ambient-Pressure X-ray Photoelectron Spectroscopy Investigation

被引：72

作者：

Jiang, Peng ^{[1
,2
]}

Porsgaard, Soeren ^{[1
,3
]}

Borondics, Ferenc ^{[4
]}

Koeber, Mariana ^{[1
,5
]}

Caballero, Alfonso ^{[1
,6
,7
]}

Bluhm, Hendrik ^{[4
]}

Besenbacher, Flemming ^{[3
]}

Salmeron, Miquel ^{[1
,2
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

[3] Aarhus Univ, Interdisciplinary Nanosci Ctr iNANO, DK-8000 Aarhus C, Denmark

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA

[5] Inst Microelect Madrid, Tres Cantos 28760, Spain

[6] Univ Seville, CSIC, Inst Ciencia Mat, Seville, Spain

[7] Univ Seville, CSIC, Dept Quim Inorgan, Seville, Spain

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 09期

关键词：

CO OXIDATION; ELECTRONIC-STRUCTURE; CATALYTIC-ACTIVITY; METAL-CLUSTERS; ACTIVE GOLD; NANOPARTICLES; SIZE; ADSORPTION; AU; NANOTECHNOLOGY;

D O I：

10.1021/ja909987j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The interaction of O-2 with gold foil and gold nanoparticles grown by thermal deposition on TiO2(110) was studied by in situ ambient pressure X-ray photoelectron spectroscopy at room temperature. No spontaneous dissociation of O-2 was observed either on Au foil or oil Au nanoparticles up to 1 Torr of O-2. X-ray irradiation, however, is very effective in promoting gold oxidation on both surfaces in the presence of O-2. Our results help reconcile recent conflicting experimental observations regarding the activation of molecular oxygen, which is a crucial issue in Au catalyzed oxidation reactions.

引用

页码：2858 / +

页数：4

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