Surface coupling of methyl radicals for efficient low-temperature oxidative coupling of methane

Selective coupling of methyl radicals to produce C 2 species (C H 4 and 6 ) is a key challenge for oxidative methane (OCM). In traditional OCM reaction systems, homogeneous transformation in O -containing gases are uncontrollable, resulting limited selectivity yield. Herein, we demonstrate that generated by La 3 at low temperature can selectively couple on the surface 5 wt% Na WO /SiO . The controllable against overoxidation barely changes activity but boosts three times achieves yield as high 10.9% bed only 570 °C. Structure-property studies suggest nanoclusters active sites radical coupling. strong CH · affinity these even endow some combustion catalysts with activity. findings open new direction develop catalyst. bifunctional catalyst system, which composes activation center center, may deliver promising performance temperatures below ignition (~600 °C) therefore more controllable, safer, certainly attractive an actual process. Methyl