Thermocatalytic splitting of CO2 using sol-gel synthesized Co-ferrite redox materials

In this investigation, the redox reactivity of CoxFe3−xO4 materials was examined in multiple thermochemical CO2 splitting cycles. Sol-gel method was applied for the synthesis of CoxFe3−xO4 materials and the prepared gels of CoxFe3−xO4 materials were aged, dried, and further annealed up to 600 °C in air. The characterization results indicate formation of phase pure CoxFe3−xO4 materials. The thermal reduction (at 1400 °C for 60 min in the presence of inert Ar) and CO2 splitting (at 1000 °C for 30 min in the presence of CO2/Ar mixture) aptitude of each CoxFe3−xO4 material was estimated by using a high temperature set-up consisting of a thermogravimetric analyzer. From the TGA analysis, it was understood that the amounts of O2 released and CO produced by CoFe2O4 was higher and stable as compared to the other Co-ferrite materials. CoFe2O4 was capable of producing 76.2 µmol of O2/g·cycle and 139 µmol of CO/g·cycle in ten thermochemical. The thermal reduction and CO2 splitting aptitude of the CoFe2O4 was spotted to be greater than the CeO2 material.This publication was made possible by the NPRP grant (NPRP8-370-2-154) from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of author(s).Scopu