期刊
SURFACE SCIENCE
卷 606, 期 17-18, 页码 1416-1421出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.susc.2012.05.004
关键词
HRCLS; XPS; STM; LEED; Rh(111); Rh2O3
资金
- Swedish Research Council
- Crafoord Foundation
- Knut and Alice Wallenberg Foundation
- Foundation for Strategic Research (SSF)
- Anna and Edwin Berger Foundation
- Austrian Science Funds (FWF) [F4511-N16]
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.
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