New CeO2–TiO2, WO3–TiO2 and WO3–CeO2–TiO2 mesoporous aerogel catalysts for the low temperature selective catalytic reduction of NO by NH3

New mesoporous and well-structured aerogel catalysts (CeO2–TiO2, WO3–TiO2 WO3–CeO2–TiO2) were elaborated via the sol–gel method, characterized by means of various techniques (XRD; N2-Physisorption at 77 K; NH3-TPD; H2-TPR; DRUV–Vis spectroscopy) evaluated in selective catalytic reduction (SCR) NO NH3. The results reveal that all develop essentially diffraction peaks TiO2 anatase phase are classified as materials with a high surface area (70 < SBET 106 m2 g?1), large porosity (0.27 VPT 0.46 cm3 g?1) nanometer size crystallites (8–15 nm). addition Ce and/or W influences differently structure, texture, size, oxygen concentration, total acidity redox ability samples clearly affects their NO-SCR activity which follows this order: CeO2–TiO2 WO3–CeO2–TiO2. It was also found cerium species more active low temperature reaction than tungsten ones (NO conversions obtained 300 °C using 75 0%, respectively). On other hand, it suggested interactions between play key role improving reactivity WO3–CeO2–TiO2 catalyst SCR Interestingly, conversion into N2 reaches 85% exceeds 90% 320 400 over novel meso-structured catalyst.