The oxidative dehydrogenation (ODH) of but-1-ene was carried out using the lattice oxygen in ferrite catalysts in the temperature range of 200-300 degrees C with a fixed-bed flow reactor at atmospheric pressure. Various ferrite catalysts, such as NiFe2O4/AC-500, ZnFe2O4/AC-500, CuFe2O4/AC-500, and CuFe2O4/AC500,-400,-300,-280, were prepared in the presence of activated carbon in the calcination temperature range of 280-500 degrees C. When but-1-ene-TPR was measured using various ferrite catalysts, CuFe2O4/AC500 progressed the ODH of but-1-ene at 200-300 degrees C. Among the catalysts, CuFe2O4/AC-500 showed the highest Buta-1,3-diene (BD) yield, at 270 degrees C. XRD and XPS analyses of the catalyst after the ODH suggested that the lattice oxygen in Cu-O bonded to the tetrahedral site (Cu2+ T) of the ferrite structure was used for the ODH. In addition, the used catalyst was recovered by re-oxidation with molecular O-2. Moreover, CuFe2O4/AC-280, which calcined at 280 C, had the highest specific surface area and improved the BD yield with an increase in contact area with but-1-ene. In the repeated ODH (reaction and regeneration cycle), CuFe2O4/AC-500 and-280 catalysts maintained BD yields of 7.5% and 11.3%, respectively. BD production is thought to be related to the amount of Cu2+ T. (C) 2017 Elsevier B.V. All rights reserved.