Details

Autor(en) / Beteiligte

• CARGNELLO, M
• DELGADO JAEN, J. J
• HERNANDEZ GARRIDO, J. C
• BAKHMUTSKY, K
• MONTINI, T
• CALVINO GAMEZ, J. J
• GORTE, R. J
• FORNASIERO, P

Titel

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

Ist Teil von

• Science (American Association for the Advancement of Science), 2012-08, Vol.337 (6095), p.713-717

Ort / Verlag

Washington, DC: American Association for the Advancement of Science

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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°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 (CeO(2)) 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°C. Enhanced metal-support interactions led to exceptionally high methane oxidation, with complete conversion below 400°C and outstanding thermal stability under demanding conditions.