Search

Your search keyword '"Hutchings, G.J."' showing total 121 results
Start Over Author "Hutchings, G.J." Language english
121 results on '"Hutchings, G.J."'

17. Liquid phase oxidation of cyclohexane using bimetallic Au-Pd/MgO catalysts

Author

Liu, X., Conte, M., Sankar, M., He, Q., Murphy, D.M., Morgan, D., Jenkins, R.L., Knight, D., Whiston, K., Kiely, C.J., and Hutchings, G.J.

Subjects
inorganic chemicals
Abstract

A detailed study of the selective oxidation of cyclohexane has been performed using bimetallic gold–palladium catalysts supported on magnesium oxide. Mono-metallic supported gold or palladium catalysts show limited activity for cyclohexane oxidation. However, a significantly enhanced catalytic performance is observed when supported gold–palladium alloy catalysts are used for this particular reaction. This synergy is observed for alloys spanning a wide range of gold-to-palladium molar ratios. Mechanistic studies reveal a promotion effect that occurs from alloying palladium with gold on the supported catalyst, which significantly improves the homo-cleavage of the O–O bond in cyclohexyl hydroperoxide, an important intermediate species in cyclohexane oxidation.

Published
2015

18. Molybdenum blue nano-rings: an effective catalyst for the partial oxidation of cyclohexane

Author

Liu, X., Conte, M., Weng, W., He, Q., Jenkins, R.L., Watanabe, M., Morgan, D.J., Knight, D.W., Murphy, D.M., Whiston, K., Kiely, C.J., and Hutchings, G.J.

Abstract

Molybdenum blue (MB), a multivalent molybdenum oxide with a nano-ring morphology is well-known in analytical chemistry but, to date it has been largely ignored in other applications. In the present work, MB has been characterized by STEM-HAADF imaging for the first time, showing the nano-ring morphology of this complex molybdenum oxide and the ordered super-molecular framework crystals that can result from the self-assembly of these MB nano-ring units. The potential of MB as an oxidation catalyst has also been investigated, where it is shown to have excellent catalytic activity and stability in the selective oxidation of cyclohexane to cyclohexanol and cyclohexanone which are important intermediates in the production of nylon.

Published
2015

19. Characterization of Au3+ species in Au/C catalysts for the hydrochlorination reaction of acetylene

Author

Conte, M., Davies, C.J., Morgan, D.J., Carley, A.F., Johnston, P., and Hutchings, G.J.

Abstract

A set of Au/C catalysts for the gas phase hydrochlorination of acetylene to vinyl chloride monomer were prepared using a range of strong acids as impregnating solvents and varying the preparation drying temperature. The most active catalyst is the material prepared using aqua regia as solvent with an intermediate drying temperature of 140 °C. The effects of the catalyst preparation parameters on the catalytic activity are examined using XPS and TPR as analytical tools. In particular, the use of thermal reduction methods allows the determination of kinetic parameters for the reduction of Au3+ to Au0 by means of H2. These data support the existence of a redox cycle between Au3+/Au0 when carbon is used as support.

Published
2014

20. In situ spectroscopic investigation of oxidative dehydrogenation and disproportionation of benzyl alcohol

Author

Nowicka, E., Hofmann, J.P., Parker, S.F., Sankar, M., Lari, G.M., Kondrat, S.A., Knight, D.W., Bethell, D., Weckhuysen, B.M., Hutchings, G.J., Inorganic Chemistry and Catalysis, and Sub Inorganic Chemistry and Catalysis

Abstract

In the solvent free oxidation of benzyl alcohol, using supported gold–palladium nanoalloys, toluene is often one of major by-products and it is formed by the disproportionation of benzyl alcohol. Gold–palladium catalysts on acidic supports promote both the disproportionation of benzyl alcohol and oxidative dehydrogenation to form benzaldehyde. Basic supports completely switch off disproportionation and the gold–palladium nanoparticles catalyse the oxidative dehydrogenation reaction exclusively. In an attempt to provide further details on the course of these reactions, we have utilized in situ ATR-IR, in situ DRIFT and inelastic neutron scattering spectroscopic methods, and in this article we present the results of these in situ spectroscopic studies.

Published
2013

24. Amorphous vanadium phosphate catalysts prepared using precipitation with supercritical CO2 as an antisolvent

Author

Hutchings, G.J., Lopez-Sanchez, J.A., Bartley, J., Webster, J.M., Burrows, A., Kiely, C.J., Carley, A.F., Rhodes, C., Havecker, M., Knop-Gericke, A., Mayer, R.W., Schlogl, R., Volta, J.C., Poliakoff, M., Institut de recherches sur la catalyse (IRC), Centre National de la Recherche Scientifique (CNRS), and IRCELYON, ProductionsScientifiques

Subjects
[CHIM.CATA] Chemical Sciences/Catalysis, [CHIM.CATA]Chemical Sciences/Catalysis
Published
2002

26. Structural transformation sequence occuring during the activation under n-butane-air of a cobalt-doped vanadium phosphate hemihydrate precursor for mild oxidation to maleic anhydride

Author

Sajip, S., Bartley, J., Burrows, A., Rhodes, C., Volta, J.C., Kiely, C.J., Hutchings, G.J., IRCELYON, ProductionsScientifiques, Institut de recherches sur la catalyse (IRC), and Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.CATA] Chemical Sciences/Catalysis, [CHIM.CATA]Chemical Sciences/Catalysis
Published
2001

27. Amorphous vanadium phosphate catalysts from supercritical antisolvent precipitation

Author

Hutchings, G.J., Bartley, J., Webster, J.M., Lopez-Sanchez, J.A., Gilbert, D.J., Kiely, C.J., Carley, A.F., Howdle, S.M., Sajip, S., Caldarelli, S., Rhodes, C., Volta, J.C., Poliakoff, M., IRCELYON, ProductionsScientifiques, Institut de recherches sur la catalyse (IRC), and Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.CATA] Chemical Sciences/Catalysis, [CHIM.CATA]Chemical Sciences/Catalysis
Published
2001

30. The structural transformation of (VO)2P2O7 to VPO4

Author

Sajip, S., Macpherson, G., Kiely, C.J., Hutchings, G.J., Abon, M., Volta, J.C., IRCELYON, ProductionsScientifiques, Institut de recherches sur la catalyse (IRC), Centre National de la Recherche Scientifique (CNRS), and CALDERON BENIVADES H A, YACAMAN M J

Subjects
[CHIM.CATA] Chemical Sciences/Catalysis, [CHIM.CATA]Chemical Sciences/Catalysis
Published
1998

31. Improved method of preparation of vanadium phosphate catalysts

Author

Hutchings, G.J., Sananes, M.T., Sajip, S., Kiely, C.J., Burrows, A., Ellison, I.J., Volta, J.C., IRCELYON, ProductionsScientifiques, Institut de recherches sur la catalyse (IRC), and Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.CATA] Chemical Sciences/Catalysis, [CHIM.CATA]Chemical Sciences/Catalysis
Published
1997

32. The V4+/V5+ balance as a criterion of selection of vanadium phosphorus oxide catalysts for n-butane oxidation to maleic anhydride: a proposal to explain the role of Co and Fe dopants

Author

Sajip, S., Kiely, C.J., Tuel, A., Hutchings, G.J., Volta, J.C., Institut de recherches sur la catalyse (IRC), Centre National de la Recherche Scientifique (CNRS), and IRCELYON, ProductionsScientifiques

Subjects
[CHIM.CATA] Chemical Sciences/Catalysis, [CHIM.CATA]Chemical Sciences/Catalysis
Published
1997

34. 'Letter to the editor: REF_INTERNE on ''unit cell information for delta- and gamma-VOPO4'' by Z. G. Li, R. L. Harlow, N. Herron III, H. S. Horowitz, and E. M. McCarron'

Author

Kiely, C.J., Burrows, A., Sajip, S., Rhodes, C., Bartley, J., Hutchings, G.J., Volta, J.C., Institut de recherches sur la catalyse (IRC), Centre National de la Recherche Scientifique (CNRS), and IRCELYON, ProductionsScientifiques

Subjects
[CHIM.CATA] Chemical Sciences/Catalysis, [CHIM.CATA]Chemical Sciences/Catalysis
Published
1997

44. Role of the product in the transformation of a catalyst to its active state

Author

Hutchings, G.J., Desmartin-Chomel, A., Olier, R., Volta, J.C., Institut de recherches sur la catalyse (IRC), Centre National de la Recherche Scientifique (CNRS), and IRCELYON, ProductionsScientifiques

Subjects
[CHIM.CATA] Chemical Sciences/Catalysis, [CHIM.CATA]Chemical Sciences/Catalysis
Published
1994

45. Vanadium phosphate catalysts prepared by the reduction of VOPO4, 2H2O

Author

Hutchings, G.J., Olier, R., Sananes, M.T., Volta, J.C., IRCELYON, ProductionsScientifiques, Institut de recherches sur la catalyse (IRC), Centre National de la Recherche Scientifique (CNRS), and Cortes Corberan V, Vic Bellon S

Subjects
[CHIM.CATA] Chemical Sciences/Catalysis, [CHIM.CATA]Chemical Sciences/Catalysis
Published
1993

48. FTIR study of CO adsorption on Pd/SiO2 and Pd-Cu/SiO2 treated with sulphur dioxide.

Author

Ashour, S.S., Bailie, J.E., Rochester, C.H., Thomson, J., and Hutchings, G.J.

Abstract

Infrared spectra are reported of Pd/SiO2 and Pd-Cu/SiO2 exposed at 295 K to either CO followed by SO2 or SO2 followed by CO. Chemisorptive interaction of SO2 with bridging CO sites on Pd {100} faces created cationic Pd sites which adsorbed CO linearly. Multibonding CO sites on Pd {111} faces and linear CO sites were poisoned by weak non-dissociative SO2 adsorption, and could be regenerated by evacuation. Pd/SiO2 was more resistant than Cu/SiO2 to SO2 poisoning but for Pd-Cu/SiO2 the poisoning of Pd was promoted by the presence of Cu. [ABSTRACT FROM AUTHOR]

Published
1997
Full Text
View/download PDF

49. Catalysis by well characterized materials - discussion

Author

Macbride, J.A.H., Serwicka, E.M., Védrine, J.C., Santen, van, R.A., Haber, J., Ponec, V., Nagy, J.B., Hutchings, G.J., Centi, G., Palczewska, W., Thomas, J.M., Sermon, P.A., Roberts, M.W., Wells, P.B., and Inorganic Materials & Catalysis

Abstract

General discussion: Prof. R. A. van Santen (University of Technology, Eindhoven, The Netherlands commented: I would like to point out that the predicted reactivity of bridging 0 species agrees with the results of Pauling's valency rules. I would like, to ask whether it would not be better to study clusters containing Mo as well as V, since the acidic proton coordinated to the bridging oxygen is generated by vanadium. If one were to apply thermodynamic arguments, which of the oxygens (bridging or monocoordinated) would be most active?

Published
1989

Catalog

Books, media, physical & digital resources
See catalog results