The effect of precursors salts on surface state of Pd/Al2O3 and Pd/CeO2/Al2O3 catalysts
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| Format: | Artículo científico |
| Sprache: | en |
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Academia Brasileira de Ciências
2004
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| _version_ | 1876487721166307328 |
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| author | André L. Guimarães |
| author_facet | André L. Guimarães |
| contents | The effect of precursors salts on surface state of Pd/Al2O3 and Pd/CeO2/Al2O3 catalysts André L. Guimarães Lídia C. Dieguez Martin Schmal Multidisciplinaria (Ciencias Naturales y Exactas) Palladium precursors cerium oxide characterization The influence of the precursors on the promoting effect of ceria on Pd/Al2O3 catalyst, when ceria is coatedover alumina was studied. The reaction of propane oxidation proceeded under different feed conditions andthe surface active sites were characterized by X-ray photoelectron spectroscopy (XPS) and in situ diffusereflectance spectroscopy (DRS).XPS and DRS results show that PdO/Pd0 interface are the active sites independent of the precursor, while thecatalysts containing CeO2 showed formation of palladium species in the highest oxidation state, probablyPdO2 (338 eV) after the oxidation of propane. Besides, the O/Al and O/Ce ratios evidenced the increase ofoxygen storage in the presence of CeO2. In addition, the precursor acetylacetonate favors the oxygen storagein the lattice. 2004 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32776415 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.76 |
| format | Artículo científico |
| id | redalyc_32776415 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | The effect of precursors salts on surface state of Pd/Al2O3 and Pd/CeO2/Al2O3 catalysts André L. Guimarães Multidisciplinaria (Ciencias Naturales y Exactas) Palladium precursors cerium oxide characterization The effect of precursors salts on surface state of Pd/Al2O3 and Pd/CeO2/Al2O3 catalysts André L. Guimarães Lídia C. Dieguez Martin Schmal Multidisciplinaria (Ciencias Naturales y Exactas) Palladium precursors cerium oxide characterization The influence of the precursors on the promoting effect of ceria on Pd/Al2O3 catalyst, when ceria is coatedover alumina was studied. The reaction of propane oxidation proceeded under different feed conditions andthe surface active sites were characterized by X-ray photoelectron spectroscopy (XPS) and in situ diffusereflectance spectroscopy (DRS).XPS and DRS results show that PdO/Pd0 interface are the active sites independent of the precursor, while thecatalysts containing CeO2 showed formation of palladium species in the highest oxidation state, probablyPdO2 (338 eV) after the oxidation of propane. Besides, the O/Al and O/Ce ratios evidenced the increase ofoxygen storage in the presence of CeO2. In addition, the precursor acetylacetonate favors the oxygen storagein the lattice. 2004 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32776415 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.76 |
| title | The effect of precursors salts on surface state of Pd/Al2O3 and Pd/CeO2/Al2O3 catalysts |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) Palladium precursors cerium oxide characterization |
| url | https://www.redalyc.org/articulo.oa?id=32776415 |