DOI: 10.1126/science.267.5198.661. Solid-State Defect Mechanism in Vanadyl Pyrophosphate Catalysts: Implications for Selective Oxidation

Solid-State Defect Mechanism in Vanadyl Pyrophosphate Catalysts: Implications for Selective Oxidation

10.1126/science.267.5198.661

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

High-resolution and in situ electron microscopy of vanadyl pyrophosphate catalysts reacted in alkane ( n -butane) and other reducing environments have shown evidence for surface structure modifications accompanied by two sets of symmetry-related extended defects. Defect analysis reveals that the defects are formed by pure (glide) shear mechanism. The defect mechanism suggests the presence of basal (coplanar) anion vacancies, associated with Lewis acid centers, at oxygen sites linking corner-sharing phosphorus tetrahedra and vanadyl octahedra in the active plane. These in-plane defect sites may be key to the activation of the alkane, especially in the dehydrogenation.

Bibliography

Gai, P. L., & Kourtakis, K. (1995). Solid-State Defect Mechanism in Vanadyl Pyrophosphate Catalysts: Implications for Selective Oxidation. Science, 267(5198), 661â663.

Authors 2

Pratibha L. Gai (first)
K. Kourtakis (additional)

References 22 Referenced 160

Bergman R. I. U.S. Patent 3 293 268 (1966).
Schneider R. A. U.S. Patent 4 043 943 (1977).
BELTRAN-PORTER, D, EUROPEAN JOURNAL OF SOLID STATE AND INORGANIC CHEMISTRY 28: 131 (1991). / EUROPEAN JOURNAL OF SOLID STATE AND INORGANIC CHEMISTRY (1991)
BORDES, E, CATAL TODAY 1: 499 (1987). (10.1016/0920-5861(87)85003-4) / CATAL TODAY (1987)
BORDES, E, NATURE OF THE ACTIVE AND SELECTIVE SITES IN VANADYL PYROPHOSPHATE, CATALYST OF OXIDATION OF N-BUTANE, BUTENE AND PENTANE TO MALEIC-ANHYDRIDE, CATALYSIS TODAY 16: 27 (1993). (10.1016/0920-5861(93)85003-I) / CATALYSIS TODAY (1993)
BOYES, E.D., PHYSICA C 159: 801 (1989). (10.1016/0921-4534(89)90153-6) / PHYSICA C (1989)
BOYES E.D. unpublished data.
CENTI, G, VANADYL PYROPHOSPHATE CATALYSTS - PREFACE, CATALYSIS TODAY 16: 1 (1993). (10.1016/0920-5861(93)85001-G) / CATALYSIS TODAY (1993)
CENTI, G, VANADYL PYROPHOSPHATE CATALYSTS - PREFACE, CATALYSIS TODAY 16: 1 (1993). (10.1016/0920-5861(93)85001-G) / CATALYSIS TODAY (1993)
CENTI, G, MECHANISTIC ASPECTS OF MALEIC-ANHYDRIDE SYNTHESIS FROM C4-HYDROCARBONS OVER PHOSPHORUS VANADIUM-OXIDE, CHEMICAL REVIEWS 88: 55 (1988). (10.1021/cr00083a003) / CHEMICAL REVIEWS (1988)
CEVANI, F, APPL CATAL 9: 191 (1984). (10.1016/0166-9834(84)80063-9) / APPL CATAL (1984)
Cevani, F., Journal of the Chemical Society, Chemical Communications: 492 (1985). / Journal of the Chemical Society, Chemical Communications (1985)
Ebner, J. R., Structure-Activity: 31 (1991). / Structure-Activity (1991)
10.1126/science.247.4942.553
GAIBOYES, P.L., DEFECTS IN OXIDE CATALYSTS - FUNDAMENTAL-STUDIES OF CATALYSIS IN ACTION, CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 34: 1 (1992). (10.1080/01614949208021918) / CATALYSIS REVIEWS-SCIENCE AND ENGINEERING (1992)
GAIBOYES, P.L., REAL-SPACE IMAGING OF MOLECULAR-SIEVES COMPOSED OF ALUMINUM PHOSPHATES AND THEIR METAL-SUBSTITUTED ANALOGS, JOURNAL OF PHYSICAL CHEMISTRY 96: 8206 (1992). (10.1021/j100200a002) / JOURNAL OF PHYSICAL CHEMISTRY (1992)
GORBUNOVA, Y.E., DOKL AKAD NAUK SSSR 279: 585 (1979). / DOKL AKAD NAUK SSSR (1979)
GRANADOS, M.L., J CATAL 112: 671 (1993). / J CATAL (1993)
Hirsch P. B. Electron Microscopy of Thin Crystals (1985).
HODNETT, B.K., VANADIUM-PHOSPHORUS OXIDE CATALYSTS FOR THE SELECTIVE OXIDATION OF C-4 HYDROCARBONS TO MALEIC-ANHYDRIDE, CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 27: 373 (1985). (10.1080/01614948508064740) / CATALYSIS REVIEWS-SCIENCE AND ENGINEERING (1985)
HOROWITZ, H.S., V-P-O CATALYSTS FOR OXIDATION OF BUTANE TO MALEIC-ANHYDRIDE - INFLUENCE OF (VO)2H4P2O9 PRECURSOR MORPHOLOGY ON CATALYTIC PROPERTIES, APPLIED CATALYSIS 38: 193 (1988). (10.1016/S0166-9834(00)82825-0) / APPLIED CATALYSIS (1988)
VERMA, R.L., IND ENG CHEM PROD RD 18: 7 (1979). (10.1021/i360069a003) / IND ENG CHEM PROD RD (1979)

Dates

Type	When
Created	18 years, 9 months ago (Oct. 27, 2006, 2:19 p.m.)
Deposited	1 year, 7 months ago (Jan. 12, 2024, 4:52 p.m.)
Indexed	1 month, 2 weeks ago (July 8, 2025, 6:43 a.m.)
Issued	30 years, 6 months ago (Feb. 3, 1995)
Published	30 years, 6 months ago (Feb. 3, 1995)
Published Print	30 years, 6 months ago (Feb. 3, 1995)

Funders 0

None

BibTeX

@article{Gai_1995, title={Solid-State Defect Mechanism in Vanadyl Pyrophosphate Catalysts: Implications for Selective Oxidation}, volume={267}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.267.5198.661}, DOI={10.1126/science.267.5198.661}, number={5198}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Gai, Pratibha L. and Kourtakis, K.}, year={1995}, month=feb, pages={661–663} }

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