Orientation and morphology of molybdenum sulfide catalysts supported on titania particles, observed by using high-resolution electron microscopy

A high-resolution electron microscope (HREM) was used to study molybdenum sulfide catalysts supported on anatase-type titania. A large number of MoS 2 crystallites with lateral dimensions of 5–10 nm were observed in HREM micrographs of the catalyst sulfided in a stream of H 2S/N 2. These crystallite...

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Bibliographic Details
Published in:Applied catalysis. A, General General, 2000-05, Vol.197 (2), p.247-253
Main Authors: Sakashita, Yukio, Araki, Yasuhiro, Honna, Kosaku, Shimada, Hiromichi
Format: Article
Language:English
Subjects:
Catalysis
Catalysts: preparations and properties
Chemistry
Edge-bonding
Epitaxial relationship
Exact sciences and technology
General and physical chemistry
HDS catalyst
Hydrotreating
Petroleum refining
Support effect
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:A high-resolution electron microscope (HREM) was used to study molybdenum sulfide catalysts supported on anatase-type titania. A large number of MoS 2 crystallites with lateral dimensions of 5–10 nm were observed in HREM micrographs of the catalyst sulfided in a stream of H 2S/N 2. These crystallites maintained epitaxial relationships with the anatase surface: for instance, (1 1 0) MoS 2 // (0 0 1) anatase with [0 0 1] MoS 2 // [1 1 0] anatase or (1 1 0) MoS 2 // (1 1 0) anatase with [0 0 1] MoS 2 // [0 0 1] anatase. Because of these relationships, edge-bonded MoS 2 crystallites were selectively formed on the anatase-type titania surface.
ISSN:0926-860X
1873-3875
DOI:10.1016/S0926-860X(99)00488-3