ZSM-5-confined Cr₁–O₄ active sites boost methane direct oxidation to C1 oxygenates under mild conditions

Cr 1 –O 4 as an active site in the Cr 1 /ZSM-5 SAC can catalyze the DOM to form value-added C1 oxygenated products with a productivity of 21 100 μmol g cat −1 h −1 and a selectivity of 99.8% at 50 °C within 30 min, which outperforms most state-of-the-art catalysts.