Ethylene is a valuable and widely used platform in industrial chemical. Herein, we report a potential route for selective and efficient ethylene production via chemical looping oxidative dehydrogenation of ethane using alkaline, rare earth and transition metals modified BaCoO₃ perovskite as the circulative redox catalyst. The catalysts were characterized by XRD, XPS, SEM, TEM, N₂ adsorption-desorption, H₂-TPR, and O₂-TPD analyses. Results showed that ethane conversion and ethylene selectivity were mainly regulated by lattice oxygen and Co valence of the catalysts, respectively. Doping of La to A-site of BaCoO₃ promoted ethane conversion while doping of Cu to B-site contributed to ethylene selectivity. Both ethane conversion and ethylene selectivity were enhanced by the co-doping of La and Cu to A/B-site of BaCoO₃, obtaining the highest selectivity of 81.2% at ethane conversion of 67.6%. The ethylene yield over Ba_0.7La_0.3Co_0.8Cu_0.2O₃ was 7.9% higher than that over patent BaCoO₃ (53.7% versus 45.8%). In addition, the Ba_0.7La_0.3Co_0.8Cu_0.2O₃ catalyst also exhibited a stable catalytic performance during 12 redox recycles.

乙烯是 工业化学中有价值且广泛使用的平台。在此，我们报告了通过使用碱性、稀土和过渡金属改性的 BaCoO ₃钙钛矿作为循环氧化还原催化剂，通过乙烷的化学循环氧化脱氢来选择性和高效生产乙烯的潜在途径。通过XRD、XPS、SEM、TEM、N ₂吸附-脱附、H ₂ -TPR和O ₂ -TPD分析对催化剂进行了表征。结果表明，乙烷转化率和乙烯选择性主要受催化剂的晶格氧和Co价的调节。La 掺杂到 BaCoO _{3的 A 位}促进乙烷转化，同时将Cu掺杂到B位有助于乙烯选择性。通过将La和Cu共掺杂到BaCoO ₃的A/B位，乙烷转化率和乙烯选择性都得到了提高，在乙烷转化率为67.6%时获得了81.2%的最高选择性。Ba _0.7 La _0.3 Co _0.8 Cu _0.2 O ₃的乙烯收率比专利的BaCoO ₃高7.9% （53.7%对45.8%）。此外，Ba _0.7 La _0.3 Co _0.8 Cu _0.2 O ₃催化剂在12次氧化还原循环中也表现出稳定的催化性能。