Structure of the Rh2O3(0001) surface

被引：36
|
作者：
Blomberg, S. [1 ]
Lundgren, E. [1 ]
Westerstrom, R. [1 ]
Erdogan, E. [1 ]
Martin, N. M. [1 ]
Mikkelsen, A. [1 ]
Andersen, J. N. [1 ]
Mittendorfer, F. [2 ,3 ]
Gustafson, J. [1 ]
机构：
[1] Lund Univ, Div Synchrotron Radiat Res, SE-22100 Lund, Sweden
[2] Vienna Univ Technol, Inst Appl Phys, Vienna, Austria
[3] Vienna Univ Technol, Ctr Computat Mat Sci, Vienna, Austria
来源：
SURFACE SCIENCE | 2012年 / 606卷 / 17-18期
基金：
瑞典研究理事会;
关键词：
HRCLS; XPS; STM; LEED; Rh(111); Rh2O3; AUGMENTED-WAVE METHOD; CO OXIDATION; CATALYTIC REACTIVITY; MOLECULAR-DYNAMICS; V2O3(0001) SURFACE; AMBIENT PRESSURES; ATOMIC-SCALE; RH; METALS; NANOPARTICLES;
D O I：
10.1016/j.susc.2012.05.004
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：
We have studied the (0001) surface termination of Rh2O3 on a Rh(111) single crystal using a combination of high resolution core level spectroscopy, low energy electron diffraction, scanning tunneling microscopy and density functional theory. By exposing the Rh(111) to atomic oxygen we are able to grow Rh2O3 layers exposing the (0001) surface. The experiments support the theoretical predictions stating that the surface is terminated with an O-Rh-O trilayer yielding a RhO2 termination instead of a bulk Rh2O3 termination. The structural details as found by the DFT calculations are presented and reasons for the previously observed strong differences in catalytic activity between the structurally similar RhO2 surface oxide, and the Rh2O3(0001) surface are discussed. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：1416 / 1421
页数：6
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