Conversion of CO 2 into fuels and valuable chemicals can simultaneously address two major global issues: climate change and the increasing energy demand. Most of the previous studies regarding the thermochemical splitting of CO 2 into CO have been carried out at elevated temperatures of up to 1400 C. In this study, under isothermal reaction conditions, manganite-based perovskites are used to convert CO 2 to CO in a thermogravimetric analyzer (TGA). In addition, the use of CH 4 as a reducing agent has lowered the reaction temperatures (≤900 C). This study primarily focuses on the influence of A-and B-site substitution on the redox performances of the manganite-based perovskites. Based on the redox performances of four samples (CaMnO 3 ,

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