| Autor: |
Mulcahy, F.M., Houalla, M., Hercules, D.M. |
| Zdroj: |
Journal of Catalysis; January 1993, Vol. 139 Issue: 1 p72-80, 9p |
| Abstrakt: |
Samples containing 8% Mo and l5% W supported on magnesium- and fluoride-modified aluminas were prepared by incipient wetness impregnation and examined in the dried and calcined states using X-ray photoelectron spectroscopy (XPS, ESCA). The presence of fluoride as an additive decreased the dispersion of the Mo and W phases for dried samples. The opposite effect was observed for dried Mg-modified samples. The effects of F and Mg addition largely disappeared when the samples were calcined. The results are interpreted in terms of the interactions between Mo and W species and the basic hydroxyl groups of the alumina. Copyright 1993, 1999 Academic Press |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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