Studies on CO2 decomposition over H2-reduced MFe2O4 (M = Ni, Cu, Co, Zn)

Decomposition of CO2 over reduced MFe2O4 (M = Ni, Co, Cu, Zn) was studied by H2–TPR, H2–TG, and CO2–TG. XRD Rietveld analysis was used for determining phase composition and crystallite size of reduced and oxidized samples. The results indicate that spinel CoFe2O4 and CuFe2O4 are reduced to metals by H2, while ZnFe2O4 and NiFe2O4 only partly reduced at 350 °C. The CoFe2O4 spinel ferrite shows the best activity in decomposing CO2 and the ZnFe2O4 shows the best recovery ability in the process of redox.

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