Mixed oxides Ce1-xZrxO2 prepared by slow coprecipitation in NaOH were tested for NO2 adsorption in dynamic conditions at room temperature. The samples were characterized before and after exposure to NO2 by XRD, N-2-adsorption, thermal analysis, potentiometric titration, and FT-IR. Mixed oxides show a better NO2 adsorption capacity than the parent materials (CeO2 and Zr(OH)(4)). This effect is linked to the presence of reduced cerium and oxygen vacancies induced by the addition of Zr4+ cations to the structure. The results indicate that NO2 reacts with Ce3+ to form nitrite and nitrate species on the surface. The NO retention increases with an increase in the Zr(OH)(4) content. A decrease in the density of -OH groups on the surface after the exposure to NO2, suggests their involvement in reactive adsorption of NO and/or NO2. From the structural point of view, no real difference was observed on the Ce1-xZrxO2 materials before and after exposure to NO2.