New ceria and sulfate co-modified V₂O₅-TiO₂ aerogel catalysts were developed, using the one-step sol gel method associated with the supercritical drying process, for Diesel DeNO_x technology. N₂ adsorption-desorption, XRD, H₂-TPR, NH₃-TPD, Raman and DRUV-Vis spectroscopy were employed to probe the physico-chemical properties of TiO₂, V₂O₅-TiO₂, V₂O₅-CeO₂-TiO₂ and V₂O₅-CeO₂-TiO₂-SO₄²⁻ aerogel materials. XPS was used to obtain further information about the oxidation states of the active sites on the surface of the novel V₂O₅-CeO₂-TiO₂-SO₄²⁻ aerogel catalyst. The characterization results showed the successful synthesis of a new generation of well nanostructured aerogel catalysts with high surface area, large porosity and good thermal stability. V, Ce and SO₄²⁻ actives species were found highly dispersed on TiO₂ surface and their presence strongly influenced the surface acidity and the redox properties of the aerogel catalysts. Sulfate anions created strong acid sites and most probably contributed to the stabilization of V and Ce surface species at their 4 + and 3 + oxidation state, respectively. In the SCR-NO by NH₃ under oxygen rich conditions, V₂O₅-TiO₂ aerogel catalyst exhibited low NO conversions in 150–500 °C temperature range. The addition of cerium significantly increased the NO conversion at low temperature (220–400 °C). However, the simultaneous incorporation of cerium and sulfate has led to a novel V₂O₅-CeO₂-TiO₂-SO₄²⁻ nanostructured aerogel catalyst with superior catalytic performances, at high temperature (450–500 °C), with respect to V₂O₅-WO₃/TiO₂ commercial one (EUROCAT).

新的二氧化铈和硫酸共改性的V ₂ ø ₅ -TiO ₂气凝胶催化剂开发的，采用与超临界干燥过程中相关联的一个步溶胶凝胶方法中，柴油机DENO _X技术。Ñ ₂吸附-脱附，XRD，H ₂ -TPR，NH ₃ -TPD，拉曼和DRUV-Vis光谱被雇用来探测TiO 2的物理-化学性质₂，V ₂ ö ₅ -TiO ₂，V ₂ ö ₅ - CeO ₂ -TiO ₂和V ₂ O ₅ -CeO ₂ -TiO₂ -SO ₄ ^2-气凝胶材料。XPS用于获得有关新型V ₂ O ₅ -CeO ₂ -TiO ₂ -SO ₄ ^2-气凝胶催化剂表面活性部位氧化态的进一步信息。表征结果表明，成功合成了具有高表面积，大孔隙率和良好热稳定性的新一代纳米结构良好的气凝胶催化剂。发现V，Ce和SO ₄ ^2-活性物质高度分散在TiO _2上表面和它们的存在强烈影响了气凝胶催化剂的表面酸度和氧化还原性能。硫酸根阴离子产生强酸位点，最有可能分别有助于将V和Ce表面物种稳定在其4 +和3 +氧化态。在富氧条件下采用NH ₃的SCR-NO中，V ₂ O ₅ -TiO ₂气凝胶催化剂在150-500°C的温度范围内表现出较低的NO转化率。铈的添加显着提高了低温（220–400°C）下的NO转化率。然而，铈和硫酸盐的同时掺入导致了新型的V ₂ O ₅ -CeO ₂ -TiO ₂ -SO相对于V ₂ O ₅ -WO ₃ / TiO ₂商业化产品（EUROCAT），在高温（450-500°C）下具有卓越催化性能的₄ ^2-纳米结构气凝胶催化剂。