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Abstract
We have studied the structural properties of the phase K1.2Cu0.4Fe2O4 and the effect of potassium on its catalytic activity for oxidation of carbon. The results demonstrate that the potassium-doped phase differs from the undoped ferrite CuFe2O4 in linear dimensions of its unit cell, high density of structural defects, and low-temperature activity and activation energy for the catalytic process. Contact interaction between K1.2Cu0.4Fe2O4 and carbon in the temperature range 240–420°C leads to the reduction of Cu2+ to Cu+ and the formation of Cu2O, CuFeO2, and K2Fe4O7. Testing results for the phases identified indicate that the catalytic processes in the presence of K2Fe4O7 and K1.2Cu0.4Fe2O4 are identical.
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