CO production via thermochemical CO2 splitting over Ni ferrite-based catalysts

The thermochemical CO2 splitting activity of NiFe2O4 and NiFe2O4/ZrO2 prepared by the conventional co-precipitation method was investigated with thermogravimetric analysis (TGA) technique. Significant sintering was observed over the two samples during cyclic reactions because of the high reaction temperature. This would lead to an incomplete re-oxidation of the reduced sample in the CO2 splitting reaction. Introduction of ZrO2 could greatly enhance the thermal stability of NiFe2O4, and hence, the cycling behavior in repeated cycles. The catalytic results of NiFe2O4/ZrO2 for cyclic splitting of CO2 in a high-temperature furnace indicate that CO productivity increased with the thermal reduction temperature, while the cycling stability severely decreased with the cyclic number.