Combustion of methane over supported palladium-copper bimetallic catalysts |
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| Authors: | Bernard Bé guin, Edouard Garbowski, Stefan Dietrich Peter Michel Primet |
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| Affiliation: | (1) Laboratoire d'Application de la Chimie á l'Environnement, UMR CNRS 5634, Université Claude Bernard Lyon I, 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France;(2) Catalysis section, Osaka National Research Institute-AIST, MITI, 1-8-31 Midorigaoka, 563 Ikeda-shi, Osaka, Japan |
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| Abstract: | Monometallic and bimetallic catalysts based on palladium and copper deposited on a spinel carrier have been investigated in the catalytic combustion of methane. Great differences were found in catalytic activity, according to the sequence Pd/MgAl2O4>CuO–Pd/MgAl2O4>Pd–CuO/MgAl2O4>CuO/MgAl2O4. They were explained by changes in surface composition of the catalysts. In the case of bimetallic catalysts the metallic surface is preferentially enriched in copper, which acts as a diluting agent for the Pd atom ensembles. As a consequence, the adsorption of reactants is limited and the catalysts so obtained behave like copper slightly doped with palladium. |
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| Keywords: | Catalytic combustion methane palladium copper oxide |
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