Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
53098 | Catalysis Communications | 2007 | 4 Pages |
Abstract
The efficiency of PdO-based catalysts for the combustion of methane is strongly influenced by the dynamics of Pd–PdO transformation. Previous investigations reported that the addition of CeO2 to the support results in a strong promotion of Pd reoxidation. In this work it is shown that the mechanism of Pd–PdO transformation in redox cycles in the presence of CeO2 is associated with a deep contact between the noble metal crystallites and CeO2: only Pd particles in contact with the promoter reoxidize at high temperature, while a different dynamics characterizes the behaviour of Pd particles not in contact with CeO2.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Sara Colussi, Alessandro Trovarelli, Gianpiero Groppi, Jordi Llorca,