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Evolution of the active surface of the vanadyl pyrophosphate catalysts (1995)

Guliants, V. V. ; Benziger, J. B. ; Sundaresan, S. ; [et al.]

Springer

Catalysis letters 32 (1995), S. 379-386

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ISSN: 1572-879X

Keywords: VPO catalysis ; vanadyl(IV) pyrophosphate ; high resolution electron microscopy ; surface

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Abstract Bulk crystallinity of vanadyl(IV) pyrophosphate catalysts forn-butane partial oxidation increased up to 23 days on stream as determined by XRD and Raman spectroscopy, while selectivity reached steady state after 8–10 days. Electron microscopy detected a 15 Å amorphous layer terminating the (200) planes of (VO)2P2O7 in fresh catalysts that was not observed in the equilibrated catalysts. It is suggested that ordering of (200) planes at the surface of (VO)2P2O7 is responsible for selective oxidation.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00813232

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