Oxygen-induced step bunching and faceting of Rh(553):: Experiment and ab initio calculations

被引：67

作者：

Gustafson, J.

Resta, A.

Mikkelsen, A.

Westerstrom, R.

Andersen, J. N.

Lundgren, E.

Weissenrieder, J.

Schmid, M.

Varga, P.

Kasper, N.

Torrelles, X.

Ferrer, S.

Mittendorfer, F.

Kresse, G.

机构：

[1] Lund Univ, Dept Synchrotron Radiat Res, S-22100 Lund, Sweden

[2] Lund Univ, Max Lab, S-22100 Lund, Sweden

[3] Vienna Univ Technol, Inst Allgemeine Phys, A-1040 Vienna, Austria

[4] Max Planck Inst Met Res, D-70569 Stuttgart, Germany

[5] CSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, Spain

[6] European Synchrotron Radiat Facil, F-28043 Grenoble, France

[7] Univ Vienna, Inst Mat Phys, A-1090 Vienna, Austria

来源：

PHYSICAL REVIEW B | 2006年 / 74卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.74.035401

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using a combined experimental and theoretical approach, we show that the initial oxidation of a Rh(553) surface, a surface vicinal to (111), undergoes step bunching when exposed to oxygen, forming lower-index facets. At a pressure of about 10(-6) mbar and a temperature of 380 degrees C this leads to (331) facets with one-dimensional oxide chains along the steps, coexisting with (111) facets. Further increase of the pressure and temperature results in (111) facets only, covered by an O-Rh-O surface oxide. Our density functional theory calculations provide an atomistic understanding of the observed behavior.

引用

页数：7

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[1] Structure and reactivity of surface oxides on Pt(110) during catalytic CO oxidation [J].