Nickel-Based Ni-Ce1-xZrxO2 Catalysts Prepared by the Pechini Method for CO2 Methanation

Nickel-based Ni-Ce1-xZrxO2 catalysts were prepared by the Pechini method. The catalyst performance in the CO2 methanation reaction was studied. The catalysts exhibit high catalytic activity comparable to that of the commercial NIAP-07-05 catalyst of methanation. The catalysts were characterized by X-ray diffraction methods with experiments using synchrotron radiation, and also by high-resolution electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. The method for the preparation makes it possible to obtain fine nickel-containing particles formed during the decomposition of the Ni-Ce-Zr-O substitution solid solution obtained during the synthesis. Because of the decorating effect, however, the surface of nickel-containing particles is poorly accessible to reagents. For this reason, the Ni-Ce1-xZrxO2 catalysts obtained by the Pechini method are less active than supported Ni/Ce1-xZrxO2 catalysts.

Automated summary

Nickel-based Ni-Ce1-xZrxO2 catalysts prepared by the Pechini method show high catalytic activity in the CO2 methanation reaction, comparable to that of supported Ni/Ce1-xZrxO2 catalysts.