Insertion of transition metal species into crystalline alumina at low temperatures is proposed to achieve the dispersion of these species at atomic level paired with exceptional textural properties. Precisely, MeAl₂O₄/γ-Al₂O₃ (Me = Mn, Fe, Co, Ni, and/or Cu) nanostructured ceramic catalysts were fabricated with ultra large mesopores (16−30 nm), and high specific surface area (180−290 m² g⁻¹) and pore volume (1.1-1.6 cm³ g⁻¹). These ceramics were applied as efficient catalysts for the selective catalytic reduction (SCR) of NO with NH₃, and their selectivity was discussed in terms of N₂O formation, an undesirable byproduct. The catalysts containing Fe, Cu, or Mn showed the highest activities, however, within different temperature ranges. Further tuning of the catalytic activity and selectivity was achieved by creating ceramic catalysts with mixed compositions, e.g., CuFe and MnFe. Upon insertion of the transition metal species into crystalline structure of alumina to maximize atom efficiency, the N₂O formation profile did not change significantly for all metal aluminates except MnAl₂O₄, indicating that these catalysts are suitable for SCR and selectively promote the reduction of NO.

提出了在低温下将过渡金属物质插入晶体氧化铝中的方法，以实现这些物质在原子水平上的分散以及优异的结构性能。精确地说，我的Al ₂ ö ₄ /γ-Al系₂ ö ₃（我=锰，铁，钴，镍，和/或Cu）纳米结构的陶瓷催化剂用超大介孔（16-30纳米），和高比表面积制造面积（180-290 m ² g ^-1）和孔体积（1.1-1.6 cm ³ g ^-1）。这些陶瓷可用作有效的催化剂，用于用NH ₃选择性催化还原NO（SCR）。，并根据不希望的副产物N ₂ O的形成讨论了它们的选择性。但是，在不同温度范围内，含铁，铜或锰的催化剂显示出最高的活性。通过创建具有混合成分（例如CuFe和MnFe）的陶瓷催化剂，可以进一步调节催化活性和选择性。在将过渡金属物种插入氧化铝的晶体结构以最大程度地提高原子效率时，除MnAl ₂ O ₄以外的所有金属铝酸盐的N ₂ O形成曲线均未发生明显变化，表明这些催化剂适用于SCR并选择性地促进还原的NO。