Evolution of the active surface of the vanadyl pyrophosphate catalysts

V. V. Guliants; Jay Burton Benziger; Sankaran Sundaresan; N. Yao; I. E. Wachs

doi:10.1007/BF00813232

Evolution of the active surface of the vanadyl pyrophosphate catalysts

V. V. Guliants, Jay Burton Benziger, Sankaran Sundaresan, N. Yao, I. E. Wachs

Research output: Contribution to journal › Article › peer-review

79 Scopus citations

Abstract

Bulk crystallinity of vanadyl(IV) pyrophosphate catalysts for n-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.

Original language	English (US)
Pages (from-to)	379-386
Number of pages	8
Journal	Catalysis Letters
Volume	32
Issue number	3-4
DOIs	https://doi.org/10.1007/BF00813232
State	Published - Sep 1995

All Science Journal Classification (ASJC) codes

General Chemistry
Catalysis

Keywords

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

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10.1007/BF00813232

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title = "Evolution of the active surface of the vanadyl pyrophosphate catalysts",

abstract = "Bulk crystallinity of vanadyl(IV) pyrophosphate catalysts for n-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 {\AA} 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.",

keywords = "VPO catalysis, high resolution electron microscopy, surface, vanadyl(IV) pyrophosphate",

author = "Guliants, {V. V.} and Benziger, {Jay Burton} and Sankaran Sundaresan and N. Yao and Wachs, {I. E.}",

year = "1995",

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doi = "10.1007/BF00813232",

language = "English (US)",

volume = "32",

pages = "379--386",

journal = "Catalysis Letters",

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T1 - Evolution of the active surface of the vanadyl pyrophosphate catalysts

AU - Guliants, V. V.

AU - Benziger, Jay Burton

AU - Sundaresan, Sankaran

AU - Yao, N.

AU - Wachs, I. E.

PY - 1995/9

Y1 - 1995/9

N2 - Bulk crystallinity of vanadyl(IV) pyrophosphate catalysts for n-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.

AB - Bulk crystallinity of vanadyl(IV) pyrophosphate catalysts for n-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.

KW - VPO catalysis

KW - high resolution electron microscopy

KW - surface

KW - vanadyl(IV) pyrophosphate

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Evolution of the active surface of the vanadyl pyrophosphate catalysts

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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