The mesoporous Fe doped CeO₂ catalyst after modifying organic sulfate functional groups show an excellent activity with above 80% NO_x conversion in a temperature range of 250–450 °C. These organic-like sulfate groups bound to the Fe-O-Ce species leads to the strong electron interaction between Fe³⁺-O-Ce⁴⁺ species and sulfate groups, which modifies the acidity and redox properties of catalyst. The strong ability of S˭O/S-O in sulfate groups to accommodate electrons from a basic molecule is a driving force in the generation of acidic properties, and thus promotes to produce new Brønsted acid sites. The bondage of Fe-O-Ce species obviously inhibits the creation of thermostable bidentate NO₃⁻ species. Besides, the redox cycles between Fe³⁺ and Ce⁴⁺ are disrupted, thus inhibiting NH₃ oxidation at medium-high temperatures and resulting in the increase of NO_x conversion. Furthermore, the in situ DRIFTS results show that for the fresh samples, the coordinate NH₃ reacts not only with NO₃⁻ through L-H mechanism, but also with oxygen species to form NO_x. Differently for sulfated sample, the coordinate NH₃ might react with achieved NO₂ instead of the oxygen species through E-R mechanism, meanwhile the NH₄⁺ could react with the NO₃⁻ species through L-H mechanism.

改性有机硫酸盐官能团后，介孔铁掺杂的CeO ₂催化剂在250-450°C的温度范围内具有出色的活性，NO _x转化率超过80％。与Fe-O-Ce物种结合的这些类有机硫酸盐基团导致Fe ³⁺ -O-Ce ⁴⁺物种与硫酸盐基团之间的强电子相互作用，从而改变了催化剂的酸度和氧化还原性能。硫酸盐基团中S˭O/ SO具有较强的适应来自碱性分子的电子的能力，这是产生酸性性质的驱动力，因此促进产生新的布朗斯台德酸位。的Fe-O-Ce的物种的束缚明显抑制热稳定的二齿NO的产生₃ ^-物种。此外，铁之间的氧化还原循环³⁺和Ce ⁴⁺被破坏，从而抑制NH ₃的氧化在中等高温下，并导致增加的NO _X转化率。此外，原位DRIFTS结果表明，对于新鲜样品，坐标NH ₃发生反应不仅与NO ₃ ^-经LH机构，而且还与氧物种以形成NO _X。与硫酸盐样品不同的是，配位NH ₃可能通过ER机理与获得的NO ₂发生反应，而不是与氧发生反应，同时NH ₄ ⁺可以与NO反应₃ ^-物种通过LH机制。