The performance and characterization of the SrCl2-promoted REOx (REDCe, Pr, Tb) catalysts have been investigated for the oxidative dehydrogenation of ethane (ODE) reaction. The doping of SrCl2 to REOx significantly reduced C2H4 deep oxidation and enhanced C2H4 selectivity and C2H6 conversion. It has been shown that the catalytic performance increases in the order of 30mol% SrCl2/CeO2<30mol% SrCl2/Pr O1.83<40mol% SrCl2/TbO1.75.We observed that Cl leaching was modest in the latter two catalysts but gradual Cl loss was observed over the first catalyst. Within a reaction period of 60 h, the first catalyst degraded, whereas the latter two catalysts were stable. The C2H6 conversion, C2H4 selectivity, and C2H4 yield measured 1 h after the start of the ODE reaction were, respectively, 72.6, 68.8, and 49.9% for 30mol% SrCl2/CeO2, 79.1, 71.4, and 56.5% for 30mol% SrCl2/PrO1.83, and 82.6, 75.8, and 62.6% for 40mol% SrCl2/TbO1.75 at 660