Improving selectivity by the addition of N2O in the feed during partial oxidation of methane over supported rhodium catalysts

► Small amounts of N2O are added in the feed during partial oxidation of methane. ► Yield and selectivity towards H2 and CO increase after co-feeding N2O. ► N2O inhibits adsorption of O2 in sites where it forms electrophilic oxygen species. ► In the presence of N2O, Rh works in a reduced state. ► Reduced Rh modifies the kinetic of reactions, promoting synthesis gas.