The crucial problems for the catalysts of CO₂ methanation are the low activity at low temperature and deactivation caused by metal sintering. In order to overcome the problems or to improve the shortages, a new scheme has been put forward by loading LaNi_1-xMo_xO₃ with perovskite-type structure on SiO₂. After reduction, Ni nanoparticles, MoO_x and La₂O₃ would be all stay together and highly dispersed on SiO₂ (Ni/MoO_x-La₂O₃/SiO₂). The techniques of BET, XRD, H₂-TPR, HRTEM, ICP, H₂ chemisorption and XPS were used to characterize the prepared samples. Through effectively combining MoO_x which is active for the reaction of reverse water gas shift and Ni which can catalyze CO methanation, the resultant Ni/MoO_x-La₂O₃/SiO₂ catalyst exhibited pretty good performance for CO₂ methanation, especially showing very good resistance to metal sintering. NiLa₂O₃/SiO₂ catalyst without adding Mo was investigated for comparison. Since many metallic ions can enter into the lattice of a perovskite-type oxide, therefore, many combined catalysts for sequential reactions may be designed via this scheme.

CO ₂甲烷化催化剂的关键问题是低温下的低活性和金属烧结引起的失活。为了克服这些问题或改善其不足，提出了一种新的方案，即在SiO ₂上负载钙钛矿型结构的LaNi _1-x Mo _x O ₃。还原后，Ni纳米颗粒，MoO _x和La ₂ O ₃将全部保持在一起并高度分散在SiO ₂（Ni / MoO _x -La ₂ O ₃ / SiO ₂）上。BET，XRD，H ₂ -TPR，HRTEM，ICP，H技术₂化学吸附和XPS用于表征制备的样品。通过有效地结合用于逆水煤气变换反应的MoO _x和可催化CO甲烷化的Ni，所得Ni / MoO _x -La ₂ O ₃ / SiO ₂催化剂对CO ₂甲烷化表现出相当好的性能，特别是很好的抗金属烧结性。Ni La ₂ O ₃ / SiO ₂研究了不添加Mo的催化剂用于比较。由于许多金属离子可以进入钙钛矿型氧化物的晶格中，因此，可以通过该方案设计用于顺序反应的许多组合催化剂。