Selective oxidation of methane (CH4) to value-added chemicals with both high catalytic activity and selectivity under mild conditions remains challenging. Due to the low activity of oxygen and the overoxidation of the oxygenates, selective oxidation of CH4 to oxygenates with O2 or O2/H2 suffers from low catalytic activity and low oxygenates selectivity. Moreover, the high loading of noble metals for supported catalysts leads to high cost.