Partial oxidation of methane and reforming of methane with CO2 were carried out with Pt/Al2O3, PtZrO2 and Pt/CeO2 catalysts, in the temperature range of 350 - 900 degreesC. For partial oxidation, the catalysts showed similar stabilities, with the PtZr slightly more active. The reaction occurs in two simultaneous stages: total combustion of methane and reforming of the unconverted methane with steam and CO2, with the O-2 conversion of 100% over the whole temperature range. For reforming with CO2, the catalysts presented similar activities, but with distinct deactivation rates: while the PtAl deactivates very fast at 800 degreesC, due to deposition of inactive carbon, the PtZr and PtCe catalysts offer higher resistance to coke formation, due to the metal-support interactions and the higher mobility of oxygen in the oxide lattice.