Journal
CATALYSIS TODAY
Volume 240, Issue -, Pages 184-189Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2014.07.025
Keywords
Fe3O4 Fe2O3; Surface sensitive XPS; O K-edge XAS; Fe Ledge XAS
Funding
- DOE Office of Basic Energy Science to the SUNCAT Center for Interface Science and Catalysis
- Predictive theory of transition metal oxide catalysis
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The determination of surface terminations in transition metal oxides is not trivial because many structural configurations could be possible. They exhibit various terminations depending on the oxidation states of metal cations exposed to the surface. Fe3O4 is one example in which octahedrally and tetrahedrally coordinated Fe2+ and Fe3+ cations coexists with oxygen anions. For the identification of the surface termination of Fe3O4(1 1 1) grown on Pt(1 1 1) we have employed surface sensitive synchrotron based X-ray photoelectron and absorption spectroscopy. It has been shown that the topmost surface is octahedrally coordinated Fe3+ rich. (C) 2014 Elsevier B.V. All rights reserved.
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