期刊
CATALYSIS TODAY
卷 240, 期 -, 页码 184-189出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2014.07.025
关键词
Fe3O4 Fe2O3; Surface sensitive XPS; O K-edge XAS; Fe Ledge XAS
资金
- DOE Office of Basic Energy Science to the SUNCAT Center for Interface Science and Catalysis
- Predictive theory of transition metal oxide catalysis
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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