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<p>A novel ultra-low temperature and wide temperature window NO<sub>x</sub> elimination strategy is proposed to boost denitrification performance. In this work, MnMoO<sub>x</sub> catalysts are composited utilizing the Mo-doped sucrose reduction method. Notably, the MnMoO<sub>x</sub>-0.05 catalyst exhibits remarkable denitrification performance at 40–240&#xa0;°C, with NO conversion exceeding 95% and N<sub>2</sub> selectivity reaching 100%. Meanwhile, the NO conversion persists above 90% for 9&#xa0;h at 140&#xa0;°C under 100&#xa0;ppm SO<sub>2</sub>, showing robust SO<sub>2</sub> tolerance. It is further corroborated by physicochemical properties that Mo doping can modulate catalyst pore size and weak acid content. Additionally, the relative content of (Mn<sup>4+</sup> + Mn<sup>3+</sup>)/Mn<sup>n+</sup> increases, promoting the electron migration between Mn<sup>3+</sup> and Mn<sup>4+</sup>. The O<sub>α</sub>/(O<sub>α</sub> + O<sub>β</sub>) ratio reaches 49.60%, which enhances the chemisorption of oxygen and boosts the "fast SCR" reaction. Integrating the in situ DRIFT conclusions, we find that Mo incorporation enhances the Lewis acid sites and facilitates the emergence of nitrate species, with the MnMoO<sub>x</sub> catalysts predominantly following the Langmuir–Hinshelwood mechanism. This study offers ingenious ideas for designing advanced high-efficiency SCR catalysts with industrial applicability.</p>

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Revealing the synthesis of ultra-low temperature MnMoOx catalysts via Mo-doped sucrose reduction: high SO2 tolerance and robust catalytic performance

  • 期刊论文

  • 发表日期：

    2026年5月9日

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  • Zhenzhao Pei,
  • Haipeng Wang,
  • Runkang Dong,
  • Shu Bu,
  • Hongwei Liu

摘要

A novel ultra-low temperature and wide temperature window NOx elimination strategy is proposed to boost denitrification performance. In this work, MnMoOx catalysts are composited utilizing the Mo-doped sucrose reduction method. Notably, the MnMoOx-0.05 catalyst exhibits remarkable denitrification performance at 40–240 °C, with NO conversion exceeding 95% and N2 selectivity reaching 100%. Meanwhile, the NO conversion persists above 90% for 9 h at 140 °C under 100 ppm SO2, showing robust SO2 tolerance. It is further corroborated by physicochemical properties that Mo doping can modulate catalyst pore size and weak acid content. Additionally, the relative content of (Mn4+ + Mn3+)/Mnn+ increases, promoting the electron migration between Mn3+ and Mn4+. The Oα/(Oα + Oβ) ratio reaches 49.60%, which enhances the chemisorption of oxygen and boosts the "fast SCR" reaction. Integrating the in situ DRIFT conclusions, we find that Mo incorporation enhances the Lewis acid sites and facilitates the emergence of nitrate species, with the MnMoOx catalysts predominantly following the Langmuir–Hinshelwood mechanism. This study offers ingenious ideas for designing advanced high-efficiency SCR catalysts with industrial applicability.