Surface state of molybdenum cations in MoO3/CeO2 |
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| Authors: | Lin Dong Jingqiu Hu Bin Xu Yi Chen |
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| Institution: | (1) Department of Chemistry, Institute of Mesoscopic Solid State Chemistry, Nanjing University, 210093 Nanjing, China |
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| Abstract: | Conclusion
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The dispersion capacity of MoO3 supported on CeO2 is 0.81 rnmo1/100 m2. For samples with MoO3 content is below the dispersion capacity, Mo6+ ions exist in the surface vacancies to form the surface Mo species, and the highly dispersed Mo6+ cations are coordinated by 7 oxygen ions based on the assumption that the CeO2(111) plane is preferentially exposed.
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The differences of the dispersions between MoO3 on CeO2 and MoO3on ZnO-modified CeO2 indicate that the surface vacancies play an important role in the dispersion of MoO3.
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| Keywords: | MoO3 CeO2 dispersion capacity incorporation model snrface species |
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