Pd(111) versus Pd-Au(111) in carbon monoxide oxidation under elevated pressures
The oxidation of CO on Pd(111) and Pd70Au30(111) has been studied under pressures upto 100 Torr. Gold is found to decrease the surface activity by inhibiting oxygen dissociation. For a sufficient conversion time depending on the CO coverage and the surface identity, a dramatic boost of activity occu...
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| Veröffentlicht in: | Catalysis letters 2007-03, Vol.114 (1-2), p.110-114 |
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| container_title | Catalysis letters |
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| creator | PIEDNOIR, A LANGUILLE, M. A PICCOLO, L VALCARCEL, A CADETE SANTOS. AIRES, F. J BERTOLINI, J. C |
| description | The oxidation of CO on Pd(111) and Pd70Au30(111) has been studied under pressures upto 100 Torr. Gold is found to decrease the surface activity by inhibiting oxygen dissociation. For a sufficient conversion time depending on the CO coverage and the surface identity, a dramatic boost of activity occurs. This is ascribed to a switch from CO-induced inhibition of O2 adsorption to a regime determined by CO adsorption. The other kinetic features are explained by oxidation of palladium and adsorption-induced restructuring of the surfaces. |
| doi_str_mv | 10.1007/s10562-007-9047-3 |
| format | Article |
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| ispartof | Catalysis letters, 2007-03, Vol.114 (1-2), p.110-114 |
| issn | 1011-372X 1572-879X |
| language | eng |
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| source | SpringerNature Journals |
| subjects | Adsorption Carbon monoxide Catalysis Chemical Sciences Chemistry Environment and Society Environmental Sciences Exact sciences and technology General and physical chemistry Gold Oxidation Palladium Surface chemistry Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry |
| title | Pd(111) versus Pd-Au(111) in carbon monoxide oxidation under elevated pressures |
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