The effect of Ce on the structure of MoVNbCeO multi-metal oxide catalysts and the performance of ethane selective oxidation was investigated. These multi-metal oxide catalysts with superior oxidizability exhibit high catalytic activity, and vanadium acts as the active center for ethane oxidation reaction. The improved catalytic activity is related to the increased V⁵⁺ content on the catalyst surface, which results from the enhanced transformation of the electrons between V and Ce. Moreover, Ce effectively promotes oxygen adsorption, activation, and mobility. And the presence of Ce can also prevent MoO₃ formation and stabilize the Mo₅O₁₄-like structure. In addition, the catalyst with a moderate amount of Ce exhibits outstanding catalytic performance. Especially, the MVN-Ce catalyst with a Ce/V ratio of 0.1 exhibits the best performance: the total selectivity of the catalyst toward C₂H₄ and CH₃COOH is the highest (72%) at the ethane conversion of 31%. Therefore, MoVNbCeO multi-metal oxides are promising candidates for selective oxidation.

研究了Ce对MoVNbCeO多金属氧化物催化剂结构和乙烷选择性氧化性能的影响。这些具有优异氧化性的多金属氧化物催化剂表现出高催化活性，钒作为乙烷氧化反应的活性中心。提高的催化活性与催化剂表面上增加的 V ⁵⁺含量有关，这是由于 V 和 Ce 之间的电子转化增强所致。此外，Ce 有效地促进氧的吸附、活化和迁移。并且Ce的存在还可以防止MoO ₃的形成并稳定Mo ₅ O ₁₄样的结构。此外，含有适量 Ce 的催化剂表现出优异的催化性能。特别是Ce/V比为0.1的MVN-Ce催化剂表现出最好的性能：催化剂对C ₂ H ₄和CH ₃ COOH的总选择性最高（72%），乙烷转化率为31%。因此，MoVNbCeO 多金属氧化物是选择性氧化的有希望的候选者。