The role of palladium salt precursors in Pd-PdO/CeO2 prepared by dry milling on methane oxidation

Publication date: Available online 6 December 2019Source: Catalysis CommunicationsAuthor(s): Maila Danielis, Sara Colussi, Carla de Leitenburg, Alessandro TrovarelliAbstractHeterogeneous catalysts comprising palladium as active phase are widely used to promote a variety of reactions due to the easy tuning of Pd particle size and its oxidation state. When Pd is combined with CeO2, specific structural arrangements at the nanoscale level can strongly impact on activity and durability, especially in methane oxidation. In this work, the effect of different palladium salt precursors on the final state of a Pd/CeO2 catalyst prepared by dry milling was studied by coupling thermogravimetric characterization and temperature-programmed reaction methods. The combination of palladium acetate and a mild oxidative thermal treatment proved successful in generating an appropriate Pd0/Pd2+ mixture on the ceria surface with improved methane oxidation activity.Graphical abstract
Source: Catalysis Communications - Category: Chemistry Source Type: research