Abstract The adsorption of CO2 on Ba0.5Sr0.5Co0.8Fe0.2O3-d (BSCF) perovskite oxides in the absence and presence of O2 and H2O at various temperatures was investigated by temperature programmed desorption (TPD). XRD was used to characterize the phase of the samples before and after adsorption. No CO2 desorption peak was observed when CO2 was adsorbed on BSCF at room temperature. A CO2 desorpti…