The characterization of CrCe-doped on TiO2-pillared clay nanocomposites for NO oxidation and the promotion effect of CeOx

► CrCe/TiO2-pillared clay was newly introduced to the oxidation of NO. ► The CrCe/TiO2-pillared clay nanocomposites were synthesized. The nanoparticles were round-shaped and average particle size was less than 10 nm. ► Analysis of XPS indicated that the addition of ceria oxides could promote the formation of chemisorbed oxygen and raise the quantivalency of Cr. ► Through our research, we could find that the deactivation of the Cr based catalysts in SO2 and H2O was not totally irreversible.