Fig. 3: DOMM mechanism.
From: Pd nanocatalysts engineering for direct oxidation methane-to-methanol with 99.7% selectivity

For c-Pd nanocrystals enclosed by the {100} facet and o-Pd nanocrystals enclosed by the {111} facet, a CH4-TPD and b in situ generated H2O2 productivity at 70 °C in O2 and H2 atmosphere. For o-Pd nanocrystals enclosed by the {111} facet, c EPR spectra of radical species (*CH3 and *OH), and d in situ DRIFTS spectra of adsorbed CH4, O2, and H2 at 70 °C.