Selective oxidation of methane by the bis(mu-oxo)dicopper core stabilized on ZSM-5 and mordenite zeolites |
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Authors: | Groothaert Marijke H Smeets Pieter J Sels Bert F Jacobs Pierre A Schoonheydt Robert A |
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Institution: | Center for Surface Chemistry and Catalysis, K. U. Leuven, Kasteelpark Arenberg 23, B-3001 Leuven, Belgium. marijke.groothaert@agr.kuleuven.ac.be |
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Abstract: | This work reports on the capability of the O2-activated Cu-ZSM-5 and Cu-MOR zeolites to selectively convert methane into methanol at a temperature of 398 K. A strong correlation between (i) the activity and (ii) the intensity of the 22 700 cm-1 UV-vis band, assigned to the bis(mu-oxo)dicopper core, is found (i) as a function of the reaction temperature, (ii) as a function of the Cu loading of the zeolite, and (iii) in comparison to other Cu materials. These three lines of evidence firmly support the key role of the bis(mu-oxo)dicopper core in this selective, low-temperature hydroxylation of methane. |
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