Low-temperature CH4 total oxidation on catalysts based on high surface area SnO2

Pure SnO2, sulfated SnO2-SO42- and Pd supported on SnO2 and SnO2-SO42- were prepared from SnO2 precursor with high surface area, and used for CH4 deep oxidation. The catalysts were characterized by means of N-2-BET, XRD, TG-D TA, XPS and TPD. SnO2-SO42- shows higher activity than SnO2, due to the pre sence of more active oxygen species, superacid sites and its higher BET sur face area. Pd/SnO2 and Pd/SnO2-SO42- display essentially the same activity to each other, while it is much higher than the activity on SnO2 and SnO2-S O42-. The main reason is ascribed to the concerted action between Pd and th e supports.