Synergistic mechanism of Fe-Ce-Mn ternary oxides for wide-temperature NH3-SCR

Key Points

• This research aims to enhance the performance and stability of NH3-SCR catalysts using Fe-Ce-Mn ternary oxides.
• Developed Fe-Ce-Mn ternary oxide catalysts through sol-gel method.
• Analyzed catalytic performance from 150 to 400 °C.
• Investigated structure and surface properties via characterization techniques.
• Employed DRIFTS, TPD, and DFT calculations to study reaction mechanisms.
• Achieved over 90% NO conversion at temperatures between 150 and 350 °C.
• Maintained high N2 selectivity (>80%) under various conditions.
• Characterized stable structures with a specific surface area of ~160 m²/g.
• Revealed key intermediates through in situ coupling reactions at appropriate temperatures.

Abstract