ISSN:
1572-879X
Keywords:
phosphorus-containing catalysts
;
tungsten disulfide
;
high-resolution electron microscopy
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
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 effect on the catalysts by retarding the stacking growth of WS2 crystallites. Additionally, an aluminum phosphate crystalline phase is identified in the phosphorus promoted catalysts.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00810676
