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- W2023376845 abstract "The selective oxidation of n-butane to maleic anhydride (MA) on (VO)2P2O7-based catalysts having different vanadium oxidation states (+3.18 to +4.90) was studied by a vacuum transient technique applying the Temporal-Analysis-of-Products (TAP) reactor. Experiments in the absence of gas-phase oxygen (anaerobic conditions) revealed that all steps of the oxidation to MA may proceed on V5+ as well as on V4+ sites and that the step from furan to MA needs the catalyst state with the highest oxidation potential. In equilibrated (VO)2P2O7 catalysts the valence state of the vanadium in the surface layers involved in the selective reaction amounted to +4 and +5. Under such conditions all reaction steps primarily occur on V5+ centers but a contribution of the redox couple V4+V3+ in these steps cannot be excluded." @default.
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- W2023376845 date "1997-05-01" @default.
- W2023376845 modified "2023-10-14" @default.
- W2023376845 title "The reaction mechanism of the selective oxidation of butane on (VO)2P2O7 catalysts: The influence of the valence state of vanadium" @default.
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- W2023376845 doi "https://doi.org/10.1016/s0926-860x(96)00331-6" @default.
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