Oxidative conversion of ethane on the molybdenum oxide MoO3 mixed with 0-95% Al2O3, Ga2O3, or Y2O3 has been studied in the pulse mode at 600A degrees C. It has been revealed that the components of these systems undergo strong interaction, which leads to enhanced ethane conversion and an increased selectivity for ethylene with a decrease in the MoO3 content. The 5%MoO3-95%Al2O3 system has proved the most effective in the oxidative dehydrogenation of ethane, with the selectivity for ethylene reaching 90% at an ethane conversion of 30 wt %.