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Chemical and microstructural investigation of Pt/CeO2 catalysts reduced at temperatures ranging from 473 to 973 K |
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| Authors: | S Bernal M A Cauqui G A Cifredo J M Gatica C Larese J A Prez Omil |
| Affiliation: | Departamento de Ciencia de Materiales, Ingenieria Metalúrgica y Quimica Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Apartado 40, Puerto Real, 11510, Cádiz, Spain |
| Abstract: | The combined application of chemical techniques and HREM shows that platinum deactivation in Pt/CeO2 catalysts steadily increases with the reduction temperature (Tr: 473–1173 K). Though no suppression of the H2 adsorption was observed, the TPD-H2 traces indicate the occurrence of significant chemical changes with Tr. As revealed by HREM, the metal decoration starts at Tr: 973 K, a temperature well above those at which the chemical effects can be observed. |
| Keywords: | Pt/CeO2 catalysts |
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