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An XPS Study of the Effect of La2O3 Dopant on the Dispersion and Thermal Stability of Pt/Al2O3 Catalysts |
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| Authors: | Yang Jun-ying W. E. Swartz Jr. |
| Affiliation: | 1. Department of Chemistry , Peking University , Beijing, People's Republic of China;2. Department of Chemistry , University of South Florida , Tampa, FL, 33620 |
| Abstract: | The Pt(4d)/Al(2s) XPS intensity ratio for Pt/Al2O3 catalysts increases with the addition of La2O3 as a dopant. The Pt(311) line in the X-ray diffraction pattern also broadens with the addition of La2O3. These data imply that doping the Pt/Al2O3 catalyst with La2O3 increases the dispersion of the platinum which in turn would be expected to increase the activity and thermal stability of the catalyst. |
| Keywords: | X-ray photoelectron spectroscopy platinum catalyst dispersion lanthanum oxide dopant |