本文考察了Ce含量对提高催化剂的热稳定性的作用,并采用X-射线衍射分析Ce含量对催化剂活性组成的影响.结果表明,合适的Ce含量能够提高催化剂的热稳定性,这主要是氧化铈能够阻止NiCo_2O_4相的生成,而NiCo_2O_4的生成对本系列催化剂的燃烧活性是不利的.实验还表明,在空气气氛下有利于形成NiCo_2O_4相,在N_2/H_2O气氛中不利于NiCo_2O_4相的生成. In this paper, the effect of Ce content on the thermal stability of the catalyst was investigated and the effect of Ce content on the active composition of the catalyst was analyzed by X-ray diffraction.The results show that suitable Ce content can improve the thermal stability of the catalyst, which is mainly oxidized The formation of NiCo_2O_4 phase can be prevented by cerium, but the formation of NiCo_2O_4 is unfavorable to the combustion activity of this series of catalysts.The experiment also shows that the NiCo_2O_4 phase is favored in air atmosphere, which is disadvantageous to the formation of NiCo_2O_4 phase in N_2 / H_2O atmosphere.