In Situ Observation of Water Dissociation with Lattice Incorporation at FeO Particle Edges Using Scanning Tunneling Microscopy and X-ray Photoelectron Spectroscopy

被引：42

作者：

Deng, Xingyi ^{[1
,2
]}

Lee, Junseok ^{[1
,2
]}

Wang, Congjun ^{[1
,2
]}

Matranga, Christopher ^{[1
]}

Aksoy, Funda ^{[3
,4
]}

Liu, Zhi ^{[3
]}

机构：

[1] US DOE, NETL, Pittsburgh, PA 15236 USA

[2] URS, South Pk, PA 15129 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

[4] Nigde Univ, Fac Arts & Sci, Dept Phys, Nigde, Turkey

来源：

LANGMUIR | 2011年 / 27卷 / 06期

关键词：

SURFACE-CHEMISTRY; AU(111); GOLD; NANOPARTICLES; NANOCRYSTALS; CATALYSIS; OXIDATION; GROWTH; FILMS;

D O I：

10.1021/la1049716

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The dissociation of H(2)O and formation of adsorbed hydroxyl groups, on FeO particles grown on Au(111) were identified with in situ,: X:ray photoelectron spectroscopy (XPS) at water pressures ranging from 3 x 10(-8) to 0.1 Torr. The facile dissociation of H(2)O takes place at FeO particle edges, and it was successfully observed in situ With atomically resolved scanning tunneling microscopy (STM). The in situ STM studies show that adsorbed hydroxyl groups were formed exclusively along the edges of the FeO particles with the 0 atom becoming directly incorporated into the oxide crystalline lattice The STM results are consistent with coordinatively unsaturated ferrous (CUF) sites along the FeO particle edge causing the observed reactivity with H(2)O. Our results also directly illustrate how structural defects and under.-coordinated sites participate in chemical reactions.

引用

页码：2146 / 2149

页数：4

共 21 条

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