Ce-doped iron oxide thin films have been prepared by a liquid-phase method (LPD) and tested as methanol gas sensors. Sensing tests have shown that the addition of Ce to Fe2O3 increases the response to methanol at low temperature (< 350° C). The optimum loading of Ce was 50% in moles. At operating temperatures> 400° C, the response of CeO2-doped Fe2O3 sensors is instead lower than that of pure Fe2O3. To find properties–sensitivity relationships, the microstructure, acid–base properties and reactivity of CeO2–Fe2O3 …