利用低价态铁前驱体盐(FeSO4)对高价铁前驱体盐(Fe(NO3)3)进行替换，制备一系列新型铁-钛复合氧化物基脱硝催化剂。在该系列催化剂中，Fe0.5Fe0.5TiOy催化剂展现高稳定性、水硫耐受性及优异的低温活性与催化选择性等优点。通过X射线衍射(XRD)、拉曼光谱(Raman)、比表面积测试(BET)、程序升温法(H2-TPR、NH3-TPD、O2-TPD)、X射线光电子能谱(XPS)和原位红外(In situ DRIFTs)等分析手段对催化剂进行表征。结果表明，Fe0.5Fe0.5TiOy催化剂具有较大的比表面积（65.056 7 m2/g），较高的表面可增加还原物种含量、酸性位点数量及表面活性氧浓度。此外，该催化剂表面的NH3-SCR反应过程主要遵循E-R机理。

A series of iron-titanium mixedoxides de-NOx catalysts were prepared by replacing the Fe(NO3)3 with FeSO4. Among this series of catalysts, the Fe0.5Fe0.5TiOy catalyst shows the advantages of high stability,water-sulfur tolerance, excellent low-temperature activity and catalytics electivity. The catalysts were characterized by X-ray diffraction(XRD), Raman spectroscopy(Raman), specific surface area test(BET),programmed temperature rise method(H2-TPR, NH3-TPD, O2-TPD), X-ray photoelectron spectroscopy(XPS) and In situ infrared(In situ DRIFTs). The results show that the Fe0.5Fe0.5TiOy catalyst has a larger specific surface area（65.056 7 m2/g）, more surface reducible species,more acid sites and higher surface active oxygen concentration. Additionally, it is determined that the NH3-SCR reaction process on Fe0.5Fe0.5TiOy catalyst mainly follows the E-R mechanism.

0 引言

1 试验

   1.1 试验材料

   1.2 催化剂制备

   1.3 样品表征

   1.4 催化性能测试

2 结果与讨论

   2.1 催化性能分析

   2.2 催化剂结构分析

   2.3 催化剂氧化还原性、表面酸性及氧物种分析

   2.4 催化剂表面元素及化合价分析

   2.5 催化剂原位红外分析

3 结论