Oxide supported MoS2 catalysts of unusual morphology

A. K. Datye; S. Srinivasan; L. F. Allard; C. H.F. Peden; J. R. Brenner; L. T. Thompson

doi:10.1006/jcat.1996.0020

Oxide supported MoS₂ catalysts of unusual morphology

A. K. Datye, S. Srinivasan, L. F. Allard, C. H.F. Peden, J. R. Brenner, L. T. Thompson

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

45 Scopus citations

Abstract

Two different titanias were used as supports for MoS₂ catalysts, Degussa P25 titania and a microroughened titania prepared in our laboratory. The Mo weight loading was varied to study the effect of loading on the pyridine hydrodenitrogenation activity. It was found that the specific activity of sulfided molybdena on the P25 titania decreased monotonically with increasing loading. On the other hand, the microroughened titania did not show such a fall off in activity; furthermore its specific activity was over an order of magnitude greater than that of the P25-supported sample. The rather surprising behavior of MoS₂ supported on microroughened titania can be related to the structure of the catalyst. On the microroughened titania, the MoS₂ sheets are curved with radii of curvature ranging from 2-5 nm. These strained MoS2 layers could lead to the formation of unique catalytically active sites in the basal plane of MoS₂, not otherwise obtained on conventional supports.

Original language	English
Pages (from-to)	205-216
Number of pages	12
Journal	Journal of Catalysis
Volume	158
Issue number	1
DOIs	https://doi.org/10.1006/jcat.1996.0020
State	Published - Jan 1996
Externally published	Yes

Funding

Financial support by NSF Grant CTS 89-12366 is gratefully acknowledged (A.D.). Transmission electron microscopy was performed at the electron microbeam analysis facility within the Department of Geology at the University of New Mexico. High resolution TEM was performed at the High Temperature Materials Laboratory, Oak Ridge National Lab, supported by the Under Secretary for Conservation and Renewable Energy, Department of Energy. A.D. acknowledges support via an HTML faculty fellowship. L.T.T. and J.R.B. acknowledge financial support from the National Science Foundation Presidential Young Investigator Program (CTS-9158527) and the Shell Oil Company. Pacific Northwest Laboratory is a multi-program national laboratory operated for the U.S. Dept. of Energy by Battelle Memorial Institute under Contract DE-ACO6-76RLO1830.

Funders	Funder number
HTML
Shell Oil Company
National Science Foundation	CTS-9158527, CTS 89-12366
U.S. Department of Energy
Battelle	DE-ACO6-76RLO1830

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10.1006/jcat.1996.0020

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title = "Oxide supported MoS2 catalysts of unusual morphology",

abstract = "Two different titanias were used as supports for MoS2 catalysts, Degussa P25 titania and a microroughened titania prepared in our laboratory. The Mo weight loading was varied to study the effect of loading on the pyridine hydrodenitrogenation activity. It was found that the specific activity of sulfided molybdena on the P25 titania decreased monotonically with increasing loading. On the other hand, the microroughened titania did not show such a fall off in activity; furthermore its specific activity was over an order of magnitude greater than that of the P25-supported sample. The rather surprising behavior of MoS2 supported on microroughened titania can be related to the structure of the catalyst. On the microroughened titania, the MoS2 sheets are curved with radii of curvature ranging from 2-5 nm. These strained MoS2 layers could lead to the formation of unique catalytically active sites in the basal plane of MoS2, not otherwise obtained on conventional supports.",

author = "Datye, {A. K.} and S. Srinivasan and Allard, {L. F.} and Peden, {C. H.F.} and Brenner, {J. R.} and Thompson, {L. T.}",

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T1 - Oxide supported MoS2 catalysts of unusual morphology

AU - Datye, A. K.

AU - Srinivasan, S.

AU - Allard, L. F.

AU - Peden, C. H.F.

AU - Brenner, J. R.

AU - Thompson, L. T.

PY - 1996/1

Y1 - 1996/1

N2 - Two different titanias were used as supports for MoS2 catalysts, Degussa P25 titania and a microroughened titania prepared in our laboratory. The Mo weight loading was varied to study the effect of loading on the pyridine hydrodenitrogenation activity. It was found that the specific activity of sulfided molybdena on the P25 titania decreased monotonically with increasing loading. On the other hand, the microroughened titania did not show such a fall off in activity; furthermore its specific activity was over an order of magnitude greater than that of the P25-supported sample. The rather surprising behavior of MoS2 supported on microroughened titania can be related to the structure of the catalyst. On the microroughened titania, the MoS2 sheets are curved with radii of curvature ranging from 2-5 nm. These strained MoS2 layers could lead to the formation of unique catalytically active sites in the basal plane of MoS2, not otherwise obtained on conventional supports.

AB - Two different titanias were used as supports for MoS2 catalysts, Degussa P25 titania and a microroughened titania prepared in our laboratory. The Mo weight loading was varied to study the effect of loading on the pyridine hydrodenitrogenation activity. It was found that the specific activity of sulfided molybdena on the P25 titania decreased monotonically with increasing loading. On the other hand, the microroughened titania did not show such a fall off in activity; furthermore its specific activity was over an order of magnitude greater than that of the P25-supported sample. The rather surprising behavior of MoS2 supported on microroughened titania can be related to the structure of the catalyst. On the microroughened titania, the MoS2 sheets are curved with radii of curvature ranging from 2-5 nm. These strained MoS2 layers could lead to the formation of unique catalytically active sites in the basal plane of MoS2, not otherwise obtained on conventional supports.

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Oxide supported MoS₂ catalysts of unusual morphology

Abstract

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