Using a mixture of NO + O as the oxidant enabled the direct selective oxidation of methane to dimethyl ether (DME) over Pt/Y O . The reaction was carried out in a fixed bed reactor at 0.1 MPa over a temperature range of 275-375 °C. During the activity tests, the only carbon-containing products were DME and CO . The DME productivity (μmol g h ) was comparable to oxygenate productivities reported in the literature for strong oxidants (N O, H O , O ). The NO + O mixture formed NO , which acted as the oxygen atom carrier for the ultimate oxidant O . During the methane partial oxidation reaction, NO and NO were not reduced to N . In situ FTIR showed the formation of surface nitrate species, which are considered to be key intermediate species for the selective oxidation.
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