In-Situ FT-IR Study on Methane Combustion over Pd/NiAl2O4 Catalyst

The mechanism of methane combustion on pd/nial2o4 catalyst was studied by in-situ ft-ir spectroscopy. the results showed that the transformation from formate to carbonate was the rate-determining step for the reaction. after reaction under lean fuel condition, the active site of pre-reduced catalyst was still pd-pdo mixed phase. the existence of metal pd would convert o-2 to o-2(-) species, which would facilitate the transformation from formate to carbonate.