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Scanning tunneling microscopy evidence for the Mars-van Krevelen type mechanism of low temperature CO oxidation on an FeO(1 1 1) film on Pt(1 1 1)

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Lewandowski,  Mikolaj
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Groot,  Irene
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Shaikhutdinov,  Shamil Kamilovich
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Freund,  Hans-Joachim
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Citation

Lewandowski, M., Groot, I., Shaikhutdinov, S. K., & Freund, H.-J. (2012). Scanning tunneling microscopy evidence for the Mars-van Krevelen type mechanism of low temperature CO oxidation on an FeO(1 1 1) film on Pt(1 1 1). Catalysis today, 181(1), 52-55. doi:10.1016/j.cattod.2011.08.033.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0010-50F9-9
Abstract
We provide experimental evidence that the low temperature CO oxidation reaction on an ultrathin FeO(1 1 1) film on Pt(1 1 1) proceeds through the Mars-van Krevelen type mechanism which includes the following steps: the FeO film is oxidized into an FeO2−x film with trilayer O–Fe–O structure; CO reacts with the weakly bound, topmost oxygen atoms, effectively reducing the FeO 2−x surface to FeO-like; and the subsequent oxidation by O2 recovers the FeO2−x structure.