Nature of active species of vanadyl pyrophosphate for selective oxidation of butane to maleic anhydride

Centi, Gabriele; Trifiro, F.; Busca, G.; Ebner, J.; Gleaves, J.

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TEM, EXAFS, FTIR, temporal anal. of products, stopped-flow desorption, and catalytic measurements of (VO)2P2O7 are reported. The reduced interaction between (020) planes of (VO)2P2O7 in samples prepd. in an org. medium induces a charge localization on the V atoms of the coupled trans-vanadyl present in this plane, enhancing their catalytic reactivity in butane oxidn. Contiguous surface Broensted sites (P-OH) also participate in the mechanism of selective oxidn. C-contg. residues are present in relevant amt. on the surface during catalytic expts. and give rise to a specific fouling of the active sites, but their possible role as co-catalysts in the transfer mechanisms of single activated species is also discussed. [on SciFinder(R)]

Titolo:	Nature of active species of vanadyl pyrophosphate for selective oxidation of butane to maleic anhydride
Autori:	CENTI, Gabriele F. Trifiro G. Busca J. Ebner J. Gleaves mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	1989
Serie:	FARADAY DISCUSSIONS OF THE CHEMICAL SOCIETY
Abstract:	TEM, EXAFS, FTIR, temporal anal. of products, stopped-flow desorption, and catalytic measurements of (VO)2P2O7 are reported. The reduced interaction between (020) planes of (VO)2P2O7 in samples prepd. in an org. medium induces a charge localization on the V atoms of the coupled trans-vanadyl present in this plane, enhancing their catalytic reactivity in butane oxidn. Contiguous surface Broensted sites (P-OH) also participate in the mechanism of selective oxidn. C-contg. residues are present in relevant amt. on the surface during catalytic expts. and give rise to a specific fouling of the active sites, but their possible role as co-catalysts in the transfer mechanisms of single activated species is also discussed. [on SciFinder(R)]
Handle:	http://hdl.handle.net/11570/1907338
ISBN:	0-85186-837-1
Appare nelle tipologie:	14.b.1 Contributo in volume (Capitolo o Saggio)

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