本文利用TPR、TPR-GC和XRD技术详细地研究了镍酸镧(LaNiO_3)的还原机理.同时还利用TPO和TPR考察了还原后样品的氧化还原可逆性.结果说明:LaNiO_3分两步还原,其中单电子还原过程伴随着三电子还原过程的同时进行.LaNiO_3还原中间产物为单斜晶点的LaNiO_3;此外,还原后的具有良好的氧化还原可逆性. In this paper, the reduction mechanism of lanthanum nickelate (LaNiO_3) was studied in detail by TPR, TPR-GC and XRD techniques. The reversibility of redox conditions of the samples was also investigated by TPO and TPR. The results showed that LaNiO_3 reduced in two steps, Among them, the single electron reduction process accompanies the three-electron reduction process, and the LaNiO 3 reduction intermediate product is monoclinic LaNiO 3; in addition, the reduction has good redox reversibility.