Oxygen on an Fe monolayer on W(110): From chemisorption to oxidation

SURFACE SCIENCE

卷:617

Article

Freindl, K.¹  Partyka-Jankowska, E.²  Karas, W.³  Zajac, M.^4,5  Madej, E.¹  Spiridis, N.¹  Slezak, M.³  Slezak, T.³  Wisnios, D.³  Korecki, J.^1,3 

[1] Polish Acad Sci, Jerzy Haber Inst Catalysis & Surface Chem, PL-30239 Krakow, Poland

[2] Univ Vienna, Fac Phys, A-1090 Vienna, Austria

[3] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, PL-30059 Krakow, Poland

[4] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[5] Jagiellonian Univ, Synchrotron Radiat Ctr SOLARIS, PL-30387 Krakow, Poland

关键词: Oxygen adsorption;    Fe monolayer on W(110);    Conversion electron Mossbauer spectroscopy;    Density functional calculations;    Electronic structure;    Hyperfine interactions;   

DOI  :  10.1016/j.susc.2013.07.011

来源: Elsevier

【 摘 要 】

The adsorption of oxygen on a pseudomorphic iron monolayer deposited on a W(110) surface was studied experimentally and theoretically. Standard surface characterization methods, such as Auger electron spectroscopy and low energy electron diffraction, and specific nuclear methods, such as conversion electron Mossbauer spectroscopy (CEMS) and nuclear resonant scattering of synchrotron radiation, combined with theoretical calculations based on the density functional theory allowed us to determine the structure of the oxygen adsorbate and the electronic properties of iron atoms with different oxygen coordinations. The oxygen-(3 x 2) structure on the iron monolayer was recognized and was interpreted to be a state with oxygen chemisorbed on the non-reconstructed surface with modest electron transfer from iron to oxygen. A transition from chemisorbed oxygen to the onset of Fe-oxidation is revealed by distinct changes in the CEMS spectra. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved.

【 授权许可】

Free