A series of the mixed oxides iron and cerium, with an iron(III) oxide content ranging from 0 wt% to 100 were tested as oxygen carriers in chemical looping dry reforming methane (CL-DRM). The reactivity during CL-DRM significantly increased when cerium are forming a oxide. By careful control Fe2O3/CeO2 mass ratio, initial oxidation state reaction time activity carrier material can be adjusted so...