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Nature of the vanadia–ceria interface in V 5+/CeO 2 catalysts and its relevance for the solid-state reaction toward CeVO 4 and catalytic properties

Nature of the vanadia–ceria interface in V 5+/CeO 2 catalysts and its relevance for the solid-state reaction toward CeVO 4 and catalytic properties,10

Nature of the vanadia–ceria interface in V 5+/CeO 2 catalysts and its relevance for the solid-state reaction toward CeVO 4 and catalytic properties   (Citations: 9)
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A combination of in situ Raman, XANES, and EPR spectroscopies is used to study the nature of the interaction between V and Ce in the ceria-supported vanadia catalysts. Vanadium oxide species disperse on ceria up to 9 V atoms/nm2 of support. Surface V5+ species closely interacts with ceria support promoting a reduction of surface Ce4+ to Ce3+. Upon heating or during reaction surface vanadia reacts with ceria support forming a CeVO4 phase. The active site appears to be V5+OCe3+ for both systems. The redox cycle for oxidative dehydrogenation appears to be associated with Ce, rather than with V sites.
Journal: Journal of Catalysis - J CATAL , vol. 225, no. 1, pp. 240-248, 2004
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