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Communication Dans Un Congrès Année : 2019

Dynamic metal/support interfaces for enhancing the catalytic performance of exhaust gas catalysts.

G. Ferré
  • Fonction : Auteur
V. Frizon
  • Fonction : Auteur
A.M. Ganzler
  • Fonction : Auteur
J.M. Bassat
  • Fonction : Auteur
J.M. Heintz
A. Demourgues
  • Fonction : Auteur
M. Casapu
  • Fonction : Auteur
J.-D. Grunwaldt
  • Fonction : Auteur
M. Aouine

Résumé

The tailoring of exhaust gas catalysts is crucial to improve the air quality. Upgrades in the efficiency of the combustion process and low energy losses in the engine lead to low temperature in the exhaust line. The challenge to comply with the incoming severe legislations is to develop active catalytic converters in urban mode, typically at temperatures from 150 °C, including cold-start phases. Furthermore, design of new catalysts has to take into account scarcity of sensitive elements especially noble metals. Decreasing the metal loading over an oxide support can stabilize new types of catalytic sites (single atoms, subnanometric clusters) [1] which have to be more efficient as their concentration is limited. The interactions between such nanometric sites with the support play a key role in their thermodynamic stability, electronic and catalytic properties. In addition, the interface between noble metal nanoparticles, such as Pt and Pd, with ceria-based oxides can be tuned by exposing the catalysts to suitable redox conditionings [2-4]. This dynamic nature of the metal/ceria interface can be exploited to rationally enhance the low-temperature oxidation activity. This lecture will summarize recent advances in the concept of dynamic catalysts achieved by our group in collaboration with the Institut de Chimie de la Matière Condensée at Bordeaux and the Karlsruhe Institute of Technology. The presentation will be focus on Pt and Pd-based catalysts supported on ceria oxides for the oxidation of CO and hydrocarbons.
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Dates et versions

hal-02158339 , version 1 (18-06-2019)

Identifiants

  • HAL Id : hal-02158339 , version 1

Citer

G. Ferré, V. Frizon, A.M. Ganzler, J.M. Bassat, J.M. Heintz, et al.. Dynamic metal/support interfaces for enhancing the catalytic performance of exhaust gas catalysts.. Advances in Heterogeneous Catalysis and Electrocatalysis Including New Insights from Surface Science and Quantum Mechanics (IrseeVIII Symposium), May 2019, Irsee, Germany. ⟨hal-02158339⟩
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