Abstract
The effects of high temperature pretreatments on the activity of MgO and Li/MgO catalysts for the oxidative coupling of methane have been studied. The MgO powder catalyst exhibited a turnover frequency of 3.0×10−3 molecules/sites, at 990K, whereas the Li/MgO catalyst showed a turnover frequency of 7.0×10−2 molecules/sites, under the same reaction conditions. The initial C2 formation rate was observed to increase with pretreatment temperature over the MgO catalyst, supporting our previous proposal that F-type defects are responsible for methane activation.
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