Abstract A promising CeWTiOx catalyst for selective catalytic reduction of NOx with NH3 had been prepared by a facile one-pot solvothermal method, and the NO conversion could reach to 84% at 180 °C and maintain above 92% at the temperature range 200–460 °C. According to the NH3-TPD and N2 adsorption–desorption, surface acidity and surface area (229.44 m2/g) of the catalysts were enhanced significantly, both of them were beneficial to the NH3 adsorption in the SCR process. Besides, the results of XRD, XPS, Raman spectra and TEM indicated that the high dispersion of cerium active species as well as tungsten on anatase TiO2 was also indispensably for the excellent SCR performance. Combined with the strong reduction capacity from H2-TPR analysis as well as the enrichment of oxygen vacancy, it deserved the fine catalytic ability. More importantly, the strong synergistic effect between the Ce–W–Ti formed in the solvothermal system enhanced the catalyst’s resistance to H2O and SO2. Thus the solvothermal synthesis showed an attractive perspective in the preparation of metal oxides catalysts for the SCR process.

中文翻译：

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一种环保的宽温 CeWTiOx 催化剂，具有优异的性能，用于用 NH3 选择性催化还原 NOx

摘要 采用简便的一锅溶剂热法制备了一种有前景的用于 NH3 选择性催化还原 NOx 的 CeWTiOx 催化剂，NO 转化率在 180 °C 时可达 84%，并在 200-460 温度范围内保持在 92% 以上。 ℃。根据 NH3-TPD 和 N2 吸附-解吸，催化剂的表面酸度和表面积（229.44 m2/g）显着提高，这两者都有利于 SCR 过程中的 NH3 吸附。此外，XRD、XPS、拉曼光谱和 TEM 的结果表明，铈活性物质和钨在锐钛矿 TiO2 上的高度分散也是优异的 SCR 性能不可或缺的。结合H2-TPR分析的强大还原能力以及氧空位的富集，它应有良好的催化能力。更重要的是，在溶剂热系统中形成的 Ce-W-Ti 之间的强协同作用增强了催化剂对 H2O 和 SO2 的抵抗力。因此，溶剂热合成在制备用于 SCR 工艺的金属氧化物催化剂方面显示出有吸引力的前景。