Supported metal sulphide nanoclusters studied by HAADF‐STEM

Summary The morphology of MoS2 and WS2 nanoclusters supported on high‐surface area graphitic carbon was investigated using high angular annular dark field scanning transmission electron microscopy (HAADF‐STEM). Most of the MoS2 (WS2) nanoclusters contain only a single S‐Mo‐S (S‐W‐S) layer and the mo...

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Bibliographic Details
Published in:Journal of microscopy (Oxford) 2006-09, Vol.223 (3), p.179-181
Main Authors: CARLSSON, A., BRORSON, M., TOPSØE, H.
Format: Article
Language:English
Subjects:
Graphite
HAADF‐STEM
HDS
hydrodesulphurization
morphology
MoS2
Ni‐Mo‐S
support interaction
WS2
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Summary:Summary The morphology of MoS2 and WS2 nanoclusters supported on high‐surface area graphitic carbon was investigated using high angular annular dark field scanning transmission electron microscopy (HAADF‐STEM). Most of the MoS2 (WS2) nanoclusters contain only a single S‐Mo‐S (S‐W‐S) layer and the most commonly encountered morphology is truncated triangular. This is in contrast to the hexagonal morphology of macroscopic MoS2 (WS2) crystals. When in addition to molybdenum (tungsten), nickel is also present, the regular nanoclusters are truncated to a larger extent, indicating that Ni has influenced the morphology by the formation of so‐called Ni‐Mo‐S (Ni‐W‐S) structures. For these structures, the additional truncations are observed to lead to dodecahedral‐like shapes.
ISSN:0022-2720
1365-2818
DOI:10.1111/j.1365-2818.2006.01614.x