The interaction of hydrogen and carbon monoxide with oxygen on Cu(111)-Fe Surfaces |
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| Affiliation: | 1. State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China;2. Nuclear Engineering Research and Design Institute, Shanghai 200233, China;3. School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, Australia;4. School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;5. School of Mathematics and Science, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, China |
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| Abstract: | The interaction of hydrogen and carbon monoxide with oxygen adsorbed on Cu(111)-Fe surfaces containing different amounts of iron has been studied with ellipsometry, Auger electron spectroscopy and low energy electron diffraction. With carbon monoxide copper can be reduced completely and if, at larger iron deposits, γ-Fe2O3 is present, γ-Fe2O3 can be reduced to Fe3O4. The maximum reaction rate is proportional to the square of the total copper surface. With hydrogen all oxygen can be removed. The reduction proceeds via a number of different stages. This is explained by the subsequent occurrence of γ-Fe2O3, Fe3O4 Fe0.95O and Fe. |
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