Research Article
Sulfur Resistance of Pt-W Catalysts
Table 1
Catalysts naming convention. Data of dispersion (
), Pt and W binding energies, and atomic superficial ratios as determined by XPS.
| | | | | | BE (eV) | BE (eV) | | | | | Catalysts | 1st imp. | 2nd imp. | (%) | Pt 4d5/2 | W 4f7/2 | Cl/Al | W/Al | Pt/Al | | | | | | Pt0 | Ptδ+ | W+6 | | | |
| | W/Al | W | | | — | — | 35. 7 | — | 0.0161 | — | | Pt/Al | Pt | | 37 | 313.5 (54%) | 316.7 (46%) | — | 0.0033 | — | 0.0035 | | WPt/Al | W | Pt | 27 | 313.7 (51%) | 315.9 (49%) | 36.0 | 0.0055 | 0.0097 | 0.0029 | | PtW/Al | Pt | W | 17 | 313.3 (49%) | 315.2 (51%) | 35.9 | 0.0022 | 0.0161 | 0.0015 |
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