Ni-based mesoporous Ce0.8Zr0.2O2 catalyst with enhanced low-temperature performance for CO2 methanation

The Ni/Ce 0.8 Zr 0.2 O 2 catalysts with different Ni doping amounts (5 wt%, 10 wt%, 15 wt%, 20 wt%, and 25 wt%) are prepared by the impregnation technique and used as CO 2 methanation catalysts in this work. The effects of various Ni doping loading on CO 2 methanation catalytic performance at low temperatures were investigated in this catalytic system. The results show that the catalyst with 15 wt% Ni doping shows the best catalytic performance. Since the heated sintering of Ni nanoparticles was prevented efficiently by CO 2 methanation, these mesoporous catalysts exhibit excellent stability. Therefore, the catalyst is expected to be an efficient CO 2 methanation catalyst at low temperatures.