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Low-temperature Reduction of NOx by NH3 with Unity Conversion on Nanofilament MnO2/Activated Semi-Coke Catalyst.
He, Beini; Li, Hankun; Liang, Shuoyang; Wang, Xidong; Wang, Hao; Wang, Yiou.
Afiliación
  • He B; Peking University, Engineering, CHINA.
  • Li H; Beijing Institute of Technology, Advanced Research Institute of Multidisciplinary Sciences, CHINA.
  • Liang S; Southern University of Science and Technology, Environmental Science and Engineering, CHINA.
  • Wang X; Peking University, Energy and Resources Engineering, CHINA.
  • Wang H; Peking University, Energy and Resources Engineering, CHINA.
  • Wang Y; Beijing Institute of Technology, Advanced Research Institute of Multidisciplinary Sciences, Beijing Institute of Technology, Beijing, Room 243, ARIMS Building, 100081, Beijing, CHINA.
Chemistry ; : e202401803, 2024 Aug 07.
Article en En | MEDLINE | ID: mdl-39109481
ABSTRACT
Selective catalytic reduction of nitrogen oxides with NH3 at low temperatures remains a key goal for industrial applications. However, effective catalysts operating at 90 oC are rarely reported, limiting SCR scenarios to high-temperature conditions. Herein, we report a unique MnO2 nanofilament catalyst grown on activated semi-coke synthesized via a one-step in situ hydrothermal approach, which exhibits a stable and marked 100% conversion rate of NO to N2 with 100% selectivity at 90 oC, superior to the other prepared structures (nanowires, nanorods, and nanotubes). Temperature-programmed desorption shows a large number of acid sites on MnO2(NFs)/ASC, benefiting the formation of NH4+ ions. Meanwhile, diffuse reflectance infrared Fourier transform spectroscopy reveals the activation of NO with O2 to form bidentate nitrate/bridging nitrate NO2 intermediates via bidentate nitrate species, triggering the Fast SCR with NH3 at low temperatures. Such an effective, easy-to-prepare, and low-cost catalyst paves a new pathway for low-temperature SCR for a wide range of application scenarios.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Chemistry Asunto de la revista: QUIMICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Chemistry Asunto de la revista: QUIMICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania