An iron‐tungsten oxide catalyst was developed for selective catalytic reduction of NO with NH₃ (NH₃‐SCR) by supporting Fe₂O₃ nanoparticles onto hexagonal WO₃ nanorods. The Fe₂O₃/WO₃ catalyst showed much higher catalytic activity than Fe₂O₃ and WO₃, as explained by the synergistic effects caused by acid sites (provided by WO₃) and redox sites (provided by Fe₂O₃). X‐ray diffraction and transmission electron microscopy techniques revealed that the crystal structures and morphologies of Fe₂O₃ and WO₃ kept unchanged during the preparation of Fe₂O₃/WO₃. NH₃ adsorption curves, NH₃ temperature programmed desorption, and temperature programmed surface reaction of NO demonstrated that WO₃ possessed strong acidity but poor redox ability, whereas Fe₂O₃ had high redox ability but inadequate acidic property. Therefore, the enhancement in catalytic activity (when using Fe₂O₃/WO₃ as a catalyst) should originate from the redox‐acid synergy, as further evidenced by the low SCR activity of pure Fe₂O₃ and Fe₂O₃/TiO₂ with low capacity for adsorbing NH₃. In addition, Fe₂O₃/WO₃ showed high activity and stability in the presence of K⁺, SO₂, and H₂O, demonstrating its potential in practical applications.

中文翻译：

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通过氧化还原酸协同作用优化Fe2O3 / WO3上NH3对NH的选择性催化还原

通过将Fe ₂ O ₃纳米颗粒负载到六角形WO ₃纳米棒上，开发了一种铁钨氧化物催化剂，用于用NH ₃（NH ₃ SCR）选择性催化还原NO 。Fe ₂ O ₃ / WO ₃催化剂显示出比Fe ₂ O ₃和WO ₃高得多的催化活性，这可以解释为由酸性位点（由WO ₃提供）和氧化还原位点（由Fe ₂ O ₃提供）产生的协同效应。）。X射线衍射和透射电子显微镜技术表明，Fe ₂ O ₃ / WO ₃的制备过程中，Fe ₂ O ₃和WO ₃的晶体结构和形态保持不变。NH _3的吸附曲线，NH _3的程序升温脱附和NO的程序升温表面反应表明，WO ₃具有强酸性，但氧化还原能力较弱，而Fe ₂ O ₃具有高氧化还原能力，但酸性不足。因此，提高了催化活性（使用Fe ₂ O _3时）/ WO ₃作为催化剂）应源自氧化还原酸协同作用，这进一步由纯的Fe ₂ O ₃和Fe ₂ O ₃ / TiO _2的SCR活性低而具有较低的NH ₃吸附能力进一步证明。另外，Fe ₂ O ₃ / WO ₃在K ⁺，SO ₂和H ₂ O的存在下表现出高活性和稳定性，证明了其在实际应用中的潜力。