Articolo in rivista, 2012, ENG, 10.1126/science.1222887

Exceptional Activity for Methane Combustion over Modular Pd@CeO2 Subunits on Functionalized Al2O3

Cargnello, M.; Delgado Jaen, J. J.; Hernandez Garrido, J. C.; Bakhmutsky, K.; Montini, T.; Calvino Gamez, J. J.; Gorte, R. J.; Fornasiero, P.

University of Pennsylvania; Consiglio Nazionale delle Ricerche (CNR); Universidad de Cadiz

There is a critical need for improved methane-oxidation catalysts to both reduce emissions of methane, a greenhouse gas, and improve the performance of gas turbines. However, materials that are currently available either have low activity below 400 degrees C or are unstable at higher temperatures. Here, we describe a supramolecular approach in which single units composed of a palladium (Pd) core and a ceria (CeO2) shell are preorganized in solution and then homogeneously deposited onto a modified hydrophobic alumina. Electron microscopy and other structural methods revealed that the Pd cores remained isolated even after heating the catalyst to 850 degrees C. Enhanced metal-support interactions led to exceptionally high methane oxidation, with complete conversion below 400 degrees C and outstanding thermal stability under demanding conditions.

Science (N. Y., N.Y.) 337 (6095), pp. 713–717

Keywords

Methane Combustion, core-shell catalyst, ceria, palladium based catalyst

CNR authors

Fornasiero Paolo

CNR institutes

ICCOM – Istituto di chimica dei composti organo metallici

ID: 304062

Year: 2012

Type: Articolo in rivista

Creation: 2015-02-11 10:16:09.000

Last update: 2015-02-11 10:16:09.000

CNR authors

External IDs

CNR OAI-PMH: oai:it.cnr:prodotti:304062

DOI: 10.1126/science.1222887

ISI Web of Science (WOS): 000307354500049