In this study, a series of commercial V₂O₅-MoO₃/TiO₂ catalysts modified with Bi-Ni mixed metal oxides were prepared and tested for NO and N₂O simultaneous removal. It was found that the catalytic decomposition of N₂O was dramatically promoted over the modified SCR catalyst with 40 wt% of Bi-Ni mixed metal oxides, in which the efficiencies of NO and N₂O removal were maintained over 90% and 80% respectively. Besides, the physical and chemical properties of the modified SCR catalyst were systematically characterized. It was confirmed that the doping of Bi-Ni mixed metal oxides could promote the oxygen vacancies over the surface of V₂O₅-MoO₃/TiO₂ catalyst, thereby facilitating the decomposition of N₂O. Whereas, the surface acid sites for NH₃ adsorption and the ratio of V⁵⁺ was decreased remarkably with the presence of Bi-Ni species, which partly suppressed the activity of NO catalytic reduction.

在这项研究中，制备了一系列用 Bi-Ni 混合金属氧化物改性的商业 V ₂ O ₅ -MoO ₃ /TiO ₂催化剂，并测试了同时去除NO 和 N ₂ O 的能力。结果表明，与含 40 wt% Bi-Ni 混合金属氧化物的改性 SCR 催化剂相比，N ₂ O的催化分解得到显着促进，其中 NO 和 N ₂ O 的去除效率保持在 90% 和 80% 以上分别。此外，系统表征了改性SCR催化剂的物理和化学性质。证实Bi-Ni混合金属氧化物的掺杂可以促进V ₂ O表面的氧空位₅ -MoO ₃ /TiO ₂催化剂，从而促进了 N ₂ O的分解。然而，随着 Bi-Ni 物种的存在，NH ₃吸附的表面酸位和 V ⁵⁺的比例显着降低，部分抑制了NO催化还原的活性。