Catalysts containing manganese as the primary active component have emerged as promising candidates for ultra-low temperature NH₃-SCR applications. To enhance the catalytic activity of these catalysts, a series of Mn-FeO${}_X$ catalysts were prepared using the co-precipitation method. This study focuses on investigating the appropriate calcination process for catalyst preparation using different precipitants, namely NaOH, NH₃-H₂O and Na₂CO₃. The results revealed that catalysts prepared with Na₂CO₃ as the preferred precipitant and calcined at 330°C exhibited exceptional NOx removal efficiency, exceeding 90% at a temperature of 60°C and GHSV $=$ 30,000$$h${}^{-1}$, which demonstrated this catalyst’s remarkable low-temperature reduction capability. Detailed characterization demonstrated that the MnO${}_{\mathrm{\text{X}}}$ catalysts synthesized through this process possessed an amorphous structure, superior pore structure and the highest Fe${}^{3+}$ content. These findings offer valuable insights for optimizing the preparation conditions of Mn-FeO${}_{\mathrm{\text{X}}}$ catalysts in ultra-low temperature denitrification applications.

含有锰作为主要活性成分的催化剂已成为超低温NH ₃ -SCR 应用的有希望的候选者。为了提高这些催化剂的催化活性，一系列Mn-FeO${}_X$采用共沉淀法制备催化剂。本研究的重点是研究使用不同沉淀剂（即NaOH、NH ₃ -H ₂ O 和Na ₂ CO ₃）制备催化剂的适当煅烧工艺。结果表明，以Na ₂ CO ₃作为首选沉淀剂并在330°C下煅烧制备的催化剂表现出优异的NOx去除效率，在60°C和GHSV的温度下超过90%$=$30,000$$H${}^{-1}$，这证明了该催化剂卓越的低温还原能力。详细的表征表明，MnO${}_{\mathrm{\text{X}}}$通过该工艺合成的催化剂具有非晶态结构、优异的孔结构和最高的Fe${}^{3+}$内容。这些发现为优化Mn-FeO的制备条件提供了宝贵的见解${}_{\mathrm{\text{X}}}$超低温脱硝应用中的催化剂。