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http://hdl.handle.net/11154/3386
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Title: | Phosphorus promoted WS2/Al2O3 catalysts studied by transmission electron microscopy |
Authors: | CruzReyes, J Fuentes, S Farias, MH LópezAgudo, A LópezCordero, R Avalos-Borja, M |
Issue Date: | 1996 |
Abstract: | A series of WS2/Al2O3 catalysts containing a varied amount of phosphorus (0.0, 2.5 and 6.0 wt% P2O5), sulfided at two different temperatures (873 and 1073 K), were studied by means of high-resolution transmission electron microscopy (HRTEM). The stacking of(002) layers in the WS2-2H crystallites of the ''rag'' structure increases with the addition of phosphorus, whereas its length is kept almost constant. At high sulfidation temperatures phosphorus shows a stabilizing affect on the catalysts by retarding the stacking growth of WS2 crystallites. Additionally, an aluminum phosphate crystalline phase is identified in the phosphorus promoted catalysts. |
URI: | http://hdl.handle.net/11154/3386 |
ISSN: | 1011-372X |
Appears in Collections: | Ciencias
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